55501887 has 32 divisors (see below), whose sum is σ = 88359424. Its totient is φ = 30326400.

The previous prime is 55501883. The next prime is 55501903. The reversal of 55501887 is 78810555.

It is not a de Polignac number, because 55501887 - 2² = 55501883 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 (55501883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46812 + ... + 47982.

It is an arithmetic number, because the mean of its divisors is an integer number (2761232).

Almost surely, 2^55501887 is an apocalyptic number.

55501887 is a deficient number, since it is larger than the sum of its proper divisors (32857537).

55501887 is a wasteful number, since it uses less digits than its factorization.

55501887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279.

The product of its (nonzero) digits is 56000, while the sum is 39.

The square root of 55501887 is about 7449.9588589468. The cubic root of 55501887 is about 381.4485042777.

The spelling of 55501887 in words is "fifty-five million, five hundred one thousand, eight hundred eighty-seven".