55187070 has 32 divisors (see below), whose sum is σ = 133303968. Its totient is φ = 14621568.

The previous prime is 55187063. The next prime is 55187101. The reversal of 55187070 is 7078155.

It is a super-2 number, since 2×55187070² = 6091225390369800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1149 + ... + 10568.

It is an arithmetic number, because the mean of its divisors is an integer number (4165749).

Almost surely, 2^55187070 is an apocalyptic number.

55187070 is an abundant number, since it is smaller than the sum of its proper divisors (78116898).

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

55187070 is a wasteful number, since it uses less digits than its factorization.

55187070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11884.

The product of its (nonzero) digits is 9800, while the sum is 33.

The square root of 55187070 is about 7428.8000376911. The cubic root of 55187070 is about 380.7259207801.

The spelling of 55187070 in words is "fifty-five million, one hundred eighty-seven thousand, seventy".