231515524420451 has 2 divisors, whose sum is σ = 231515524420452. Its totient is φ = 231515524420450.

The previous prime is 231515524420423. The next prime is 231515524420469. The reversal of 231515524420451 is 154024425515132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231515524420451 - 2¹⁴ = 231515524404067 is a prime.

It is not a weakly prime, because it can be changed into another prime (231515524420421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115757762210225 + 115757762210226.

It is an arithmetic number, because the mean of its divisors is an integer number (115757762210226).

Almost surely, 2^{231515524420451} is an apocalyptic number.

231515524420451 is a deficient number, since it is larger than the sum of its proper divisors (1).

231515524420451 is an equidigital number, since it uses as much as digits as its factorization.

231515524420451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960000, while the sum is 44.

Adding to 231515524420451 its reverse (154024425515132), we get a palindrome (385539949935583).

The spelling of 231515524420451 in words is "two hundred thirty-one trillion, five hundred fifteen billion, five hundred twenty-four million, four hundred twenty thousand, four hundred fifty-one".