55863905 has 4 divisors (see below), whose sum is σ = 67036692. Its totient is φ = 44691120.

The previous prime is 55863893. The next prime is 55863919. The reversal of 55863905 is 50936855.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50936855 = 5 ⋅10187371.

It can be written as a sum of positive squares in 2 ways, for example, as 31618129 + 24245776 = 5623^2 + 4924^2 .

It is not a de Polignac number, because 55863905 - 2¹² = 55859809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5586386 + ... + 5586395.

It is an arithmetic number, because the mean of its divisors is an integer number (16759173).

Almost surely, 2^55863905 is an apocalyptic number.

It is an amenable number.

55863905 is a deficient number, since it is larger than the sum of its proper divisors (11172787).

55863905 is a wasteful number, since it uses less digits than its factorization.

55863905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11172786.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 55863905 is about 7474.2160123989. The cubic root of 55863905 is about 382.2760561337.

The spelling of 55863905 in words is "fifty-five million, eight hundred sixty-three thousand, nine hundred five".