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70125231 = 31113715511
BaseRepresentation
bin1000010111000…
…00011010101111
311212221201201210
410023200122233
5120423001411
610543005503
71511024511
oct413403257
9155851653
1070125231
1136647140
121b599893
13116b3827
149455bb1
156252ca6
hex42e06af

70125231 has 16 divisors (see below), whose sum is σ = 102751488. Its totient is φ = 42187200.

The previous prime is 70125197. The next prime is 70125239. The reversal of 70125231 is 13252107.

It is not a de Polignac number, because 70125231 - 217 = 69994159 is a prime.

It is a super-2 number, since 2×701252312 = 9835096045606722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70125198 and 70125207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70125239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3235 + ... + 12276.

It is an arithmetic number, because the mean of its divisors is an integer number (6421968).

Almost surely, 270125231 is an apocalyptic number.

70125231 is a deficient number, since it is larger than the sum of its proper divisors (32626257).

70125231 is a wasteful number, since it uses less digits than its factorization.

70125231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15662.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 70125231 is about 8374.0809047919. The cubic root of 70125231 is about 412.3741515081.

Adding to 70125231 its reverse (13252107), we get a palindrome (83377338).

The spelling of 70125231 in words is "seventy million, one hundred twenty-five thousand, two hundred thirty-one".

Divisors: 1 3 11 33 137 411 1507 4521 15511 46533 170621 511863 2125007 6375021 23375077 70125231