55075491 has 8 divisors (see below), whose sum is σ = 81593360. Its totient is φ = 36716976.

The previous prime is 55075483. The next prime is 55075511. The reversal of 55075491 is 19457055.

It is not a de Polignac number, because 55075491 - 2³ = 55075483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55075441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1019890 + ... + 1019943.

It is an arithmetic number, because the mean of its divisors is an integer number (10199170).

Almost surely, 2^55075491 is an apocalyptic number.

55075491 is a deficient number, since it is larger than the sum of its proper divisors (26517869).

55075491 is a wasteful number, since it uses less digits than its factorization.

55075491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039842 (or 2039836 counting only the distinct ones).

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

The square root of 55075491 is about 7421.2863440242. The cubic root of 55075491 is about 380.4691596732.

The spelling of 55075491 in words is "fifty-five million, seventy-five thousand, four hundred ninety-one".