55021158 has 48 divisors (see below), whose sum is σ = 122653440. Its totient is φ = 17818992.

The previous prime is 55021157. The next prime is 55021159. The reversal of 55021158 is 85112055.

55021158 is a `hidden beast` number, since 5 + 502 + 1 + 158 = 666.

It is an interprime number because it is at equal distance from previous prime (55021157) and next prime (55021159).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55021151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109135 + ... + 109637.

It is an arithmetic number, because the mean of its divisors is an integer number (2555280).

Almost surely, 2^55021158 is an apocalyptic number.

55021158 is an abundant number, since it is smaller than the sum of its proper divisors (67632282).

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

55021158 is a wasteful number, since it uses less digits than its factorization.

55021158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 55021158 is about 7417.6248220033. The cubic root of 55021158 is about 380.3440051989.

The spelling of 55021158 in words is "fifty-five million, twenty-one thousand, one hundred fifty-eight".