625340551 has 4 divisors (see below), whose sum is σ = 682189704. Its totient is φ = 568491400.

The previous prime is 625340549. The next prime is 625340581. The reversal of 625340551 is 155043526.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 625340551 - 2¹ = 625340549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625340581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28424560 + ... + 28424581.

It is an arithmetic number, because the mean of its divisors is an integer number (170547426).

Almost surely, 2^625340551 is an apocalyptic number.

625340551 is a deficient number, since it is larger than the sum of its proper divisors (56849153).

625340551 is a wasteful number, since it uses less digits than its factorization.

625340551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56849152.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 625340551 is about 25006.8100924528. The cubic root of 625340551 is about 855.1432342138.

The spelling of 625340551 in words is "six hundred twenty-five million, three hundred forty thousand, five hundred fifty-one".