55305291 has 16 divisors (see below), whose sum is σ = 76788000. Its totient is φ = 35363328.

The previous prime is 55305287. The next prime is 55305319. The reversal of 55305291 is 19250355.

It is not a de Polignac number, because 55305291 - 2² = 55305287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55305221) 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, 11635 + ... + 15683.

It is an arithmetic number, because the mean of its divisors is an integer number (4799250).

Almost surely, 2^55305291 is an apocalyptic number.

55305291 is a deficient number, since it is larger than the sum of its proper divisors (21482709).

55305291 is a wasteful number, since it uses less digits than its factorization.

55305291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238.

The product of its (nonzero) digits is 6750, while the sum is 30.

The square root of 55305291 is about 7436.7527187611. The cubic root of 55305291 is about 380.9975888688.

The spelling of 55305291 in words is "fifty-five million, three hundred five thousand, two hundred ninety-one".