625115431 has 2 divisors, whose sum is σ = 625115432. Its totient is φ = 625115430.

The previous prime is 625115423. The next prime is 625115489. The reversal of 625115431 is 134511526.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 625115431 - 2³ = 625115423 is a prime.

It is a super-2 number, since 2×625115431² = 781538604148631522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 625115431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625115131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312557715 + 312557716.

It is an arithmetic number, because the mean of its divisors is an integer number (312557716).

Almost surely, 2^625115431 is an apocalyptic number.

625115431 is a deficient number, since it is larger than the sum of its proper divisors (1).

625115431 is an equidigital number, since it uses as much as digits as its factorization.

625115431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 625115431 is about 25002.3085134153. The cubic root of 625115431 is about 855.0406058939.

Adding to 625115431 its reverse (134511526), we get a palindrome (759626957).

The spelling of 625115431 in words is "six hundred twenty-five million, one hundred fifteen thousand, four hundred thirty-one".