231510553 has 2 divisors, whose sum is σ = 231510554. Its totient is φ = 231510552.

The previous prime is 231510541. The next prime is 231510557. The reversal of 231510553 is 355015132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198021184 + 33489369 = 14072^2 + 5787^2 .

It is a cyclic number.

It is not a de Polignac number, because 231510553 - 2¹⁷ = 231379481 is a prime.

It is not a weakly prime, because it can be changed into another prime (231510557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115755276 + 115755277.

It is an arithmetic number, because the mean of its divisors is an integer number (115755277).

Almost surely, 2^231510553 is an apocalyptic number.

It is an amenable number.

231510553 is a deficient number, since it is larger than the sum of its proper divisors (1).

231510553 is an equidigital number, since it uses as much as digits as its factorization.

231510553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 231510553 is about 15215.4708438484. The cubic root of 231510553 is about 614.0309527910.

Adding to 231510553 its reverse (355015132), we get a palindrome (586525685).

The spelling of 231510553 in words is "two hundred thirty-one million, five hundred ten thousand, five hundred fifty-three".