55081090 has 32 divisors (see below), whose sum is σ = 104944896. Its totient is φ = 20771520.

The previous prime is 55081087. The next prime is 55081093. The reversal of 55081090 is 9018055.

It is an interprime number because it is at equal distance from previous prime (55081087) and next prime (55081093).

It is not an unprimeable number, because it can be changed into a prime (55081093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14644 + ... + 18016.

It is an arithmetic number, because the mean of its divisors is an integer number (3279528).

Almost surely, 2^55081090 is an apocalyptic number.

55081090 is a deficient number, since it is larger than the sum of its proper divisors (49863806).

55081090 is a wasteful number, since it uses less digits than its factorization.

55081090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3474.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 55081090 is about 7421.6635601461. The cubic root of 55081090 is about 380.4820521268.

The spelling of 55081090 in words is "fifty-five million, eighty-one thousand, ninety".