620510225 has 12 divisors (see below), whose sum is σ = 778080780. Its totient is φ = 490828800.

The previous prime is 620510221. The next prime is 620510279. The reversal of 620510225 is 522015026.

It can be written as a sum of positive squares in 6 ways, for example, as 44462224 + 576048001 = 6668^2 + 24001^2 .

It is not a de Polignac number, because 620510225 - 2² = 620510221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 620510225.

It is not an unprimeable number, because it can be changed into a prime (620510221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137216 + ... + 141665.

It is an arithmetic number, because the mean of its divisors is an integer number (64840065).

Almost surely, 2^620510225 is an apocalyptic number.

It is an amenable number.

620510225 is a deficient number, since it is larger than the sum of its proper divisors (157570555).

620510225 is a wasteful number, since it uses less digits than its factorization.

620510225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278980 (or 278975 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 620510225 is about 24910.0426535163. The cubic root of 620510225 is about 852.9357427016.

The spelling of 620510225 in words is "six hundred twenty million, five hundred ten thousand, two hundred twenty-five".