55101090 has 32 divisors (see below), whose sum is σ = 144265536. Its totient is φ = 13357760.

The previous prime is 55101071. The next prime is 55101107. The reversal of 55101090 is 9010155.

It is a happy number.

It is a super-2 number, since 2×55101090² = 6072260238376200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83157 + ... + 83816.

It is an arithmetic number, because the mean of its divisors is an integer number (4508298).

Almost surely, 2^55101090 is an apocalyptic number.

55101090 is an abundant number, since it is smaller than the sum of its proper divisors (89164446).

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

55101090 is a wasteful number, since it uses less digits than its factorization.

55101090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166994.

The product of its (nonzero) digits is 225, while the sum is 21.

The square root of 55101090 is about 7423.0108446640. The cubic root of 55101090 is about 380.5280976947.

The spelling of 55101090 in words is "fifty-five million, one hundred one thousand, ninety".