55149570 has 48 divisors (see below), whose sum is σ = 163874880. Its totient is φ = 12605472.

The previous prime is 55149553. The next prime is 55149587. The reversal of 55149570 is 7594155.

It is an interprime number because it is at equal distance from previous prime (55149553) and next prime (55149587).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43140 + ... + 44399.

It is an arithmetic number, because the mean of its divisors is an integer number (3414060).

Almost surely, 2^55149570 is an apocalyptic number.

55149570 is an abundant number, since it is smaller than the sum of its proper divisors (108725310).

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

55149570 is a wasteful number, since it uses less digits than its factorization.

55149570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87559 (or 87556 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 55149570 is about 7426.2756479948. The cubic root of 55149570 is about 380.6396659317.

The spelling of 55149570 in words is "fifty-five million, one hundred forty-nine thousand, five hundred seventy".