231520053 has 8 divisors (see below), whose sum is σ = 309500928. Its totient is φ = 153942944.

The previous prime is 231520049. The next prime is 231520057. The reversal of 231520053 is 350025132.

It is an interprime number because it is at equal distance from previous prime (231520049) and next prime (231520057).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231520053 - 2² = 231520049 is a prime.

It is a super-2 number, since 2×231520053² = 107203069882245618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231520057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99600 + ... + 101897.

It is an arithmetic number, because the mean of its divisors is an integer number (38687616).

Almost surely, 2^231520053 is an apocalyptic number.

It is an amenable number.

231520053 is a deficient number, since it is larger than the sum of its proper divisors (77980875).

231520053 is a wasteful number, since it uses less digits than its factorization.

231520053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201883.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 231520053 is about 15215.7830229009. The cubic root of 231520053 is about 614.0393515648.

Adding to 231520053 its reverse (350025132), we get a palindrome (581545185).

The spelling of 231520053 in words is "two hundred thirty-one million, five hundred twenty thousand, fifty-three".