231513454510397 has 2 divisors, whose sum is σ = 231513454510398. Its totient is φ = 231513454510396.

The previous prime is 231513454510363. The next prime is 231513454510439. The reversal of 231513454510397 is 793015454315132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143936910911641 + 87576543598756 = 11997371^2 + 9358234^2 .

It is a cyclic number.

It is not a de Polignac number, because 231513454510397 - 2⁶ = 231513454510333 is a prime.

It is a super-2 number, since 2×231513454510397² (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 (231513454110397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115756727255198 + 115756727255199.

It is an arithmetic number, because the mean of its divisors is an integer number (115756727255199).

Almost surely, 2^{231513454510397} is an apocalyptic number.

It is an amenable number.

231513454510397 is a deficient number, since it is larger than the sum of its proper divisors (1).

231513454510397 is an equidigital number, since it uses as much as digits as its factorization.

231513454510397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804000, while the sum is 53.

The spelling of 231513454510397 in words is "two hundred thirty-one trillion, five hundred thirteen billion, four hundred fifty-four million, five hundred ten thousand, three hundred ninety-seven".