56255951421 has 12 divisors (see below), whose sum is σ = 86038514172. Its totient is φ = 35297851776.

The previous prime is 56255951419. The next prime is 56255951447. The reversal of 56255951421 is 12415955265.

56255951421 is a `hidden beast` number, since 5 + 6 + 2 + 559 + 51 + 42 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 52652350521 + 3603600900 = 229461^2 + 60030^2 .

It is not a de Polignac number, because 56255951421 - 2¹ = 56255951419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56255951461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183842826 + ... + 183843131.

It is an arithmetic number, because the mean of its divisors is an integer number (7169876181).

Almost surely, 2^56255951421 is an apocalyptic number.

56255951421 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

56255951421 is a deficient number, since it is larger than the sum of its proper divisors (29782562751).

56255951421 is a wasteful number, since it uses less digits than its factorization.

56255951421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367685980 (or 367685977 counting only the distinct ones).

The product of its digits is 540000, while the sum is 45.

The spelling of 56255951421 in words is "fifty-six billion, two hundred fifty-five million, nine hundred fifty-one thousand, four hundred twenty-one".