231521535240053 has 2 divisors, whose sum is σ = 231521535240054. Its totient is φ = 231521535240052.

The previous prime is 231521535240049. The next prime is 231521535240131. The reversal of 231521535240053 is 350042535125132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228436109494609 + 3085425745444 = 15114103^2 + 1756538^2 .

It is a cyclic number.

It is not a de Polignac number, because 231521535240053 - 2² = 231521535240049 is a prime.

It is a super-2 number, since 2×231521535240053² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231521535248053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115760767620026 + 115760767620027.

It is an arithmetic number, because the mean of its divisors is an integer number (115760767620027).

Almost surely, 2^{231521535240053} is an apocalyptic number.

It is an amenable number.

231521535240053 is a deficient number, since it is larger than the sum of its proper divisors (1).

231521535240053 is an equidigital number, since it uses as much as digits as its factorization.

231521535240053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540000, while the sum is 41.

The spelling of 231521535240053 in words is "two hundred thirty-one trillion, five hundred twenty-one billion, five hundred thirty-five million, two hundred forty thousand, fifty-three".