55918651 has 2 divisors, whose sum is σ = 55918652. Its totient is φ = 55918650.

The previous prime is 55918633. The next prime is 55918663. The reversal of 55918651 is 15681955.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55918651 - 2⁷ = 55918523 is a prime.

It is not a weakly prime, because it can be changed into another prime (55918631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27959325 + 27959326.

It is an arithmetic number, because the mean of its divisors is an integer number (27959326).

Almost surely, 2^55918651 is an apocalyptic number.

55918651 is a deficient number, since it is larger than the sum of its proper divisors (1).

55918651 is an equidigital number, since it uses as much as digits as its factorization.

55918651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 40.

The square root of 55918651 is about 7477.8774394878. The cubic root of 55918651 is about 382.4008907788.

The spelling of 55918651 in words is "fifty-five million, nine hundred eighteen thousand, six hundred fifty-one".