55072215 has 48 divisors (see below), whose sum is σ = 105670656. Its totient is φ = 26308800.

The previous prime is 55072201. The next prime is 55072289. The reversal of 55072215 is 51227055.

It is a happy number.

It is not a de Polignac number, because 55072215 - 2⁹ = 55071703 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34362 + ... + 35928.

It is an arithmetic number, because the mean of its divisors is an integer number (2201472).

Almost surely, 2^55072215 is an apocalyptic number.

55072215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55072215 is a deficient number, since it is larger than the sum of its proper divisors (50598441).

55072215 is a wasteful number, since it uses less digits than its factorization.

55072215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660 (or 1657 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 55072215 is about 7421.0656242887. The cubic root of 55072215 is about 380.4616158356.

The spelling of 55072215 in words is "fifty-five million, seventy-two thousand, two hundred fifteen".