656425051 has 2 divisors, whose sum is σ = 656425052. Its totient is φ = 656425050.

The previous prime is 656425043. The next prime is 656425067. The reversal of 656425051 is 150524656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656425051 - 2³ = 656425043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 656424998 and 656425016.

It is not a weakly prime, because it can be changed into another prime (656425001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328212525 + 328212526.

It is an arithmetic number, because the mean of its divisors is an integer number (328212526).

Almost surely, 2^656425051 is an apocalyptic number.

656425051 is a deficient number, since it is larger than the sum of its proper divisors (1).

656425051 is an equidigital number, since it uses as much as digits as its factorization.

656425051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 656425051 is about 25620.7933327600. The cubic root of 656425051 is about 869.0839219004.

The spelling of 656425051 in words is "six hundred fifty-six million, four hundred twenty-five thousand, fifty-one".