315023551 has 2 divisors, whose sum is σ = 315023552. Its totient is φ = 315023550.

The previous prime is 315023539. The next prime is 315023557. The reversal of 315023551 is 155320513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315023551 - 2¹¹ = 315021503 is a prime.

It is equal to p_17021257 and since 315023551 and 17021257 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315023557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157511775 + 157511776.

It is an arithmetic number, because the mean of its divisors is an integer number (157511776).

Almost surely, 2^315023551 is an apocalyptic number.

315023551 is a deficient number, since it is larger than the sum of its proper divisors (1).

315023551 is an equidigital number, since it uses as much as digits as its factorization.

315023551 is an evil number, because the sum of its binary digits is even.

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

The square root of 315023551 is about 17748.9028111599. The cubic root of 315023551 is about 680.4261681223.

It can be divided in two parts, 31502 and 3551, that added together give a palindrome (35053).

The spelling of 315023551 in words is "three hundred fifteen million, twenty-three thousand, five hundred fifty-one".