655220025 has 36 divisors (see below), whose sum is σ = 1200881968. Its totient is φ = 341318880.

The previous prime is 655220017. The next prime is 655220039. The reversal of 655220025 is 520022556.

655220025 is a `hidden beast` number, since 655 + 2 + 2 + 0 + 0 + 2 + 5 = 666.

It is not a de Polignac number, because 655220025 - 2³ = 655220017 is a prime.

It is a super-2 number, since 2×655220025² = 858626562322001250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24187 + ... + 43536.

Almost surely, 2^655220025 is an apocalyptic number.

It is an amenable number.

655220025 is a deficient number, since it is larger than the sum of its proper divisors (545661943).

655220025 is a wasteful number, since it uses less digits than its factorization.

655220025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67782 (or 67774 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 655220025 is about 25597.2659672864. The cubic root of 655220025 is about 868.5517919882.

The spelling of 655220025 in words is "six hundred fifty-five million, two hundred twenty thousand, twenty-five".