55210491 has 20 divisors (see below), whose sum is σ = 94258032. Its totient is φ = 31548528.

The previous prime is 55210487. The next prime is 55210513. The reversal of 55210491 is 19401255.

55210491 is a `hidden beast` number, since 552 + 104 + 9 + 1 = 666.

It is not a de Polignac number, because 55210491 - 2² = 55210487 is a prime.

It is a super-2 number, since 2×55210491² = 6096396632922162, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (55210481) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 48120 + ... + 49253.

Almost surely, 2^55210491 is an apocalyptic number.

55210491 is a deficient number, since it is larger than the sum of its proper divisors (39047541).

55210491 is an equidigital number, since it uses as much as digits as its factorization.

55210491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97392 (or 97383 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 55210491 is about 7430.3762354271. The cubic root of 55210491 is about 380.7797722871.

The spelling of 55210491 in words is "fifty-five million, two hundred ten thousand, four hundred ninety-one".