55921115 has 8 divisors (see below), whose sum is σ = 67145760. Its totient is φ = 44709952.

The previous prime is 55921093. The next prime is 55921133. The reversal of 55921115 is 51112955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55921115 - 2⁶ = 55921051 is a prime.

It is a super-2 number, since 2×55921115² = 6254342205686450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12962 + ... + 16728.

It is an arithmetic number, because the mean of its divisors is an integer number (8393220).

Almost surely, 2^55921115 is an apocalyptic number.

55921115 is a deficient number, since it is larger than the sum of its proper divisors (11224645).

55921115 is a wasteful number, since it uses less digits than its factorization.

55921115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6741.

The product of its digits is 2250, while the sum is 29.

The square root of 55921115 is about 7478.0421903062. The cubic root of 55921115 is about 382.4065074018.

The spelling of 55921115 in words is "fifty-five million, nine hundred twenty-one thousand, one hundred fifteen".