55191210 has 32 divisors (see below), whose sum is σ = 132950592. Its totient is φ = 14663040.

The previous prime is 55191193. The next prime is 55191221. The reversal of 55191210 is 1219155.

It is a super-2 number, since 2×55191210² = 6092139322528200, which contains 22 as substring.

It is a Curzon 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, 5157 + ... + 11703.

It is an arithmetic number, because the mean of its divisors is an integer number (4154706).

Almost surely, 2^55191210 is an apocalyptic number.

55191210 is an abundant number, since it is smaller than the sum of its proper divisors (77759382).

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

55191210 is a wasteful number, since it uses less digits than its factorization.

55191210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6838.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 55191210 is about 7429.0786777366. The cubic root of 55191210 is about 380.7354409201.

The spelling of 55191210 in words is "fifty-five million, one hundred ninety-one thousand, two hundred ten".