56955551 has 2 divisors, whose sum is σ = 56955552. Its totient is φ = 56955550.

The previous prime is 56955527. The next prime is 56955553. The reversal of 56955551 is 15555965.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56955551 - 2⁶ = 56955487 is a prime.

Together with 56955553, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 56955499 and 56955508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56955553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28477775 + 28477776.

It is an arithmetic number, because the mean of its divisors is an integer number (28477776).

Almost surely, 2^56955551 is an apocalyptic number.

56955551 is a deficient number, since it is larger than the sum of its proper divisors (1).

56955551 is an equidigital number, since it uses as much as digits as its factorization.

56955551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168750, while the sum is 41.

The square root of 56955551 is about 7546.8901542291. The cubic root of 56955551 is about 384.7500508404.

The spelling of 56955551 in words is "fifty-six million, nine hundred fifty-five thousand, five hundred fifty-one".