55528807 has 2 divisors, whose sum is σ = 55528808. Its totient is φ = 55528806.

The previous prime is 55528799. The next prime is 55528819. The reversal of 55528807 is 70882555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55528807 - 2³ = 55528799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55528807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55529807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27764403 + 27764404.

It is an arithmetic number, because the mean of its divisors is an integer number (27764404).

Almost surely, 2^55528807 is an apocalyptic number.

55528807 is a deficient number, since it is larger than the sum of its proper divisors (1).

55528807 is an equidigital number, since it uses as much as digits as its factorization.

55528807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 55528807 is about 7451.7653613087. The cubic root of 55528807 is about 381.5101654485.

The spelling of 55528807 in words is "fifty-five million, five hundred twenty-eight thousand, eight hundred seven".