625313551 has 4 divisors (see below), whose sum is σ = 628768504. Its totient is φ = 621858600.

The previous prime is 625313527. The next prime is 625313561. The reversal of 625313551 is 155313526.

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 625313551 - 2²³ = 616924943 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 (625313561) 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, 1727205 + ... + 1727566.

It is an arithmetic number, because the mean of its divisors is an integer number (157192126).

Almost surely, 2^625313551 is an apocalyptic number.

625313551 is a deficient number, since it is larger than the sum of its proper divisors (3454953).

625313551 is a wasteful number, since it uses less digits than its factorization.

625313551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3454952.

The product of its digits is 13500, while the sum is 31.

The square root of 625313551 is about 25006.2702336834. The cubic root of 625313551 is about 855.1309266801.

The spelling of 625313551 in words is "six hundred twenty-five million, three hundred thirteen thousand, five hundred fifty-one".