655215425 has 24 divisors (see below), whose sum is σ = 840130752. Its totient is φ = 506520000.

The previous prime is 655215409. The next prime is 655215461. The reversal of 655215425 is 524512556.

655215425 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 655215425 - 2⁴ = 655215409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137330 + ... + 142020.

It is an arithmetic number, because the mean of its divisors is an integer number (35005448).

Almost surely, 2^655215425 is an apocalyptic number.

It is an amenable number.

655215425 is a deficient number, since it is larger than the sum of its proper divisors (184915327).

655215425 is a wasteful number, since it uses less digits than its factorization.

655215425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4889 (or 4884 counting only the distinct ones).

The product of its digits is 60000, while the sum is 35.

The square root of 655215425 is about 25597.1761137826. The cubic root of 655215425 is about 868.5497594152.

The spelling of 655215425 in words is "six hundred fifty-five million, two hundred fifteen thousand, four hundred twenty-five".