55550605 has 24 divisors (see below), whose sum is σ = 75213792. Its totient is φ = 39060000.

The previous prime is 55550587. The next prime is 55550617. The reversal of 55550605 is 50605555.

It is not a de Polignac number, because 55550605 - 2¹⁹ = 55026317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52330 + ... + 53380.

It is an arithmetic number, because the mean of its divisors is an integer number (3133908).

Almost surely, 2^55550605 is an apocalyptic number.

55550605 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55550605 is a deficient number, since it is larger than the sum of its proper divisors (19663187).

55550605 is a wasteful number, since it uses less digits than its factorization.

55550605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129 (or 1098 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 31.

The square root of 55550605 is about 7453.2278242383. The cubic root of 55550605 is about 381.5600799049.

The spelling of 55550605 in words is "fifty-five million, five hundred fifty thousand, six hundred five".