55405086 has 16 divisors (see below), whose sum is σ = 120883968. Its totient is φ = 16789400.

The previous prime is 55405079. The next prime is 55405093. The reversal of 55405086 is 68050455.

It is an interprime number because it is at equal distance from previous prime (55405079) and next prime (55405093).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419670 + ... + 419801.

It is an arithmetic number, because the mean of its divisors is an integer number (7555248).

Almost surely, 2^55405086 is an apocalyptic number.

55405086 is an abundant number, since it is smaller than the sum of its proper divisors (65478882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55405086 is a wasteful number, since it uses less digits than its factorization.

55405086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839487.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 55405086 is about 7443.4592764386. The cubic root of 55405086 is about 381.2266134181.

The spelling of 55405086 in words is "fifty-five million, four hundred five thousand, eighty-six".