55964551 has 2 divisors, whose sum is σ = 55964552. Its totient is φ = 55964550.

The previous prime is 55964533. The next prime is 55964563. The reversal of 55964551 is 15546955.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55964551 - 2⁷ = 55964423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55964521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27982275 + 27982276.

It is an arithmetic number, because the mean of its divisors is an integer number (27982276).

Almost surely, 2^55964551 is an apocalyptic number.

55964551 is a deficient number, since it is larger than the sum of its proper divisors (1).

55964551 is an equidigital number, since it uses as much as digits as its factorization.

55964551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135000, while the sum is 40.

The square root of 55964551 is about 7480.9458626567. The cubic root of 55964551 is about 382.5054915412.

The spelling of 55964551 in words is "fifty-five million, nine hundred sixty-four thousand, five hundred fifty-one".