625312451 has 2 divisors, whose sum is σ = 625312452. Its totient is φ = 625312450.

The previous prime is 625312447. The next prime is 625312453. The reversal of 625312451 is 154213526.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 625312451 - 2² = 625312447 is a prime.

It is a super-2 number, since 2×625312451² = 782031322751254802, which contains 22 as substring.

Together with 625312453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (625312453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312656225 + 312656226.

It is an arithmetic number, because the mean of its divisors is an integer number (312656226).

Almost surely, 2^625312451 is an apocalyptic number.

625312451 is a deficient number, since it is larger than the sum of its proper divisors (1).

625312451 is an equidigital number, since it uses as much as digits as its factorization.

625312451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 29.

The square root of 625312451 is about 25006.2482391901. The cubic root of 625312451 is about 855.1304252546.

Adding to 625312451 its reverse (154213526), we get a palindrome (779525977).

The spelling of 625312451 in words is "six hundred twenty-five million, three hundred twelve thousand, four hundred fifty-one".