230836021 has 4 divisors (see below), whose sum is σ = 248592652. Its totient is φ = 213079392.

The previous prime is 230836003. The next prime is 230836033. The reversal of 230836021 is 120638032.

230836021 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 can be written as a sum of positive squares in 2 ways, for example, as 45495025 + 185340996 = 6745^2 + 13614^2 .

It is a cyclic number.

It is not a de Polignac number, because 230836021 - 2⁹ = 230835509 is a prime.

It is a super-2 number, since 2×230836021² = 106570537182224882, 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 (230836091) 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, 8878296 + ... + 8878321.

It is an arithmetic number, because the mean of its divisors is an integer number (62148163).

Almost surely, 2^230836021 is an apocalyptic number.

It is an amenable number.

230836021 is a deficient number, since it is larger than the sum of its proper divisors (17756631).

230836021 is a wasteful number, since it uses less digits than its factorization.

230836021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17756630.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 230836021 is about 15193.2886828362. The cubic root of 230836021 is about 613.4340232912.

The spelling of 230836021 in words is "two hundred thirty million, eight hundred thirty-six thousand, twenty-one".