55804685 has 4 divisors (see below), whose sum is σ = 66965628. Its totient is φ = 44643744.

The previous prime is 55804663. The next prime is 55804687. The reversal of 55804685 is 58640855.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42159049 + 13645636 = 6493^2 + 3694^2 .

It is a cyclic number.

It is not a de Polignac number, because 55804685 - 2⁸ = 55804429 is a prime.

It is a super-2 number, since 2×55804685² = 6228325735898450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55804687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5580464 + ... + 5580473.

It is an arithmetic number, because the mean of its divisors is an integer number (16741407).

Almost surely, 2^55804685 is an apocalyptic number.

It is an amenable number.

55804685 is a deficient number, since it is larger than the sum of its proper divisors (11160943).

55804685 is a wasteful number, since it uses less digits than its factorization.

55804685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11160942.

The product of its (nonzero) digits is 192000, while the sum is 41.

The square root of 55804685 is about 7470.2533424242. The cubic root of 55804685 is about 382.1409277818.

The spelling of 55804685 in words is "fifty-five million, eight hundred four thousand, six hundred eighty-five".