55320651 has 24 divisors (see below), whose sum is σ = 83289024. Its totient is φ = 36693000.

The previous prime is 55320623. The next prime is 55320653. The reversal of 55320651 is 15602355.

55320651 is a `hidden beast` number, since 5 + 5 + 3 + 2 + 0 + 651 = 666.

It is not a de Polignac number, because 55320651 - 2¹¹ = 55318603 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (55320653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60540 + ... + 61446.

It is an arithmetic number, because the mean of its divisors is an integer number (3470376).

Almost surely, 2^55320651 is an apocalyptic number.

55320651 is a deficient number, since it is larger than the sum of its proper divisors (27968373).

55320651 is an equidigital number, since it uses as much as digits as its factorization.

55320651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173 (or 1161 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 55320651 is about 7437.7853558704. The cubic root of 55320651 is about 381.0328572320.

The spelling of 55320651 in words is "fifty-five million, three hundred twenty thousand, six hundred fifty-one".