231516213274553 has 2 divisors, whose sum is σ = 231516213274554. Its totient is φ = 231516213274552.

The previous prime is 231516213274397. The next prime is 231516213274573. The reversal of 231516213274553 is 355472312615132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190482285547024 + 41033927727529 = 13801532^2 + 6405773^2 .

It is a cyclic number.

It is not a de Polignac number, because 231516213274553 - 2¹² = 231516213270457 is a prime.

It is not a weakly prime, because it can be changed into another prime (231516213274573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115758106637276 + 115758106637277.

It is an arithmetic number, because the mean of its divisors is an integer number (115758106637277).

Almost surely, 2^{231516213274553} is an apocalyptic number.

It is an amenable number.

231516213274553 is a deficient number, since it is larger than the sum of its proper divisors (1).

231516213274553 is an equidigital number, since it uses as much as digits as its factorization.

231516213274553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536000, while the sum is 50.

Adding to 231516213274553 its reverse (355472312615132), we get a palindrome (586988525889685).

The spelling of 231516213274553 in words is "two hundred thirty-one trillion, five hundred sixteen billion, two hundred thirteen million, two hundred seventy-four thousand, five hundred fifty-three".