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230101031 = 1451158581
BaseRepresentation
bin11011011011100…
…01000000100111
3121000222100021102
431231301000213
5432401213111
634455510315
75462553326
oct1555610047
9530870242
10230101031
11108982346
126508839b
1338896274
14227ba0bd
151530313b
hexdb71027

230101031 has 4 divisors (see below), whose sum is σ = 230261064. Its totient is φ = 229941000.

The previous prime is 230101019. The next prime is 230101033. The reversal of 230101031 is 130101032.

230101031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-230101031 is a prime.

It is a super-2 number, since 2×2301010312 = 105892968934525922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230101033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77840 + ... + 80741.

It is an arithmetic number, because the mean of its divisors is an integer number (57565266).

Almost surely, 2230101031 is an apocalyptic number.

230101031 is a deficient number, since it is larger than the sum of its proper divisors (160033).

230101031 is a wasteful number, since it uses less digits than its factorization.

230101031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160032.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 230101031 is about 15169.0814158274. The cubic root of 230101031 is about 612.7822659016.

Adding to 230101031 its reverse (130101032), we get a palindrome (360202063).

Subtracting from 230101031 its reverse (130101032), we obtain a palindrome (99999999).

The spelling of 230101031 in words is "two hundred thirty million, one hundred one thousand, thirty-one".

Divisors: 1 1451 158581 230101031