55029891 has 16 divisors (see below), whose sum is σ = 85568000. Its totient is φ = 31445064.

The previous prime is 55029883. The next prime is 55029893. The reversal of 55029891 is 19892055.

It is not a de Polignac number, because 55029891 - 2³ = 55029883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55029893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25711 + ... + 27768.

It is an arithmetic number, because the mean of its divisors is an integer number (5348000).

Almost surely, 2^55029891 is an apocalyptic number.

55029891 is a deficient number, since it is larger than the sum of its proper divisors (30538109).

55029891 is an equidigital number, since it uses as much as digits as its factorization.

55029891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53503 (or 53489 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 55029891 is about 7418.2134641705. The cubic root of 55029891 is about 380.3641269642.

The spelling of 55029891 in words is "fifty-five million, twenty-nine thousand, eight hundred ninety-one".