625218425 has 12 divisors (see below), whose sum is σ = 834907500. Its totient is φ = 461699520.

The previous prime is 625218413. The next prime is 625218479. The reversal of 625218425 is 524812526.

It can be written as a sum of positive squares in 6 ways, for example, as 3613801 + 621604624 = 1901^2 + 24932^2 .

It is not a de Polignac number, because 625218425 - 2⁸ = 625218169 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 961550 + ... + 962199.

It is an arithmetic number, because the mean of its divisors is an integer number (69575625).

Almost surely, 2^625218425 is an apocalyptic number.

625218425 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

625218425 is a deficient number, since it is larger than the sum of its proper divisors (209689075).

625218425 is a wasteful number, since it uses less digits than its factorization.

625218425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923772 (or 1923767 counting only the distinct ones).

The product of its digits is 38400, while the sum is 35.

The square root of 625218425 is about 25004.3681183908. The cubic root of 625218425 is about 855.0875621368.

The spelling of 625218425 in words is "six hundred twenty-five million, two hundred eighteen thousand, four hundred twenty-five".