55134990 has 24 divisors (see below), whose sum is σ = 143351208. Its totient is φ = 14702640.

The previous prime is 55134971. The next prime is 55135007. The reversal of 55134990 is 9943155.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 306216 + ... + 306395.

It is an arithmetic number, because the mean of its divisors is an integer number (5972967).

Almost surely, 2^55134990 is an apocalyptic number.

55134990 is an abundant number, since it is smaller than the sum of its proper divisors (88216218).

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

55134990 is a wasteful number, since it uses less digits than its factorization.

55134990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612624 (or 612621 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 55134990 is about 7425.2939335760. The cubic root of 55134990 is about 380.6061194902.

The spelling of 55134990 in words is "fifty-five million, one hundred thirty-four thousand, nine hundred ninety".