55520607 has 4 divisors (see below), whose sum is σ = 74027480. Its totient is φ = 37013736.

The previous prime is 55520599. The next prime is 55520639. The reversal of 55520607 is 70602555.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55520607 - 2³ = 55520599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55520687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9253432 + ... + 9253437.

It is an arithmetic number, because the mean of its divisors is an integer number (18506870).

Almost surely, 2^55520607 is an apocalyptic number.

55520607 is a deficient number, since it is larger than the sum of its proper divisors (18506873).

55520607 is a wasteful number, since it uses less digits than its factorization.

55520607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18506872.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 55520607 is about 7451.2151358017. The cubic root of 55520607 is about 381.4913851821.

The spelling of 55520607 in words is "fifty-five million, five hundred twenty thousand, six hundred seven".