55620215 has 16 divisors (see below), whose sum is σ = 76567872. Its totient is φ = 37995264.

The previous prime is 55620203. The next prime is 55620263. The reversal of 55620215 is 51202655.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55620215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6827 + ... + 12563.

It is an arithmetic number, because the mean of its divisors is an integer number (4785492).

Almost surely, 2^55620215 is an apocalyptic number.

55620215 is a deficient number, since it is larger than the sum of its proper divisors (20947657).

55620215 is a wasteful number, since it uses less digits than its factorization.

55620215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6026.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 55620215 is about 7457.8961510603. The cubic root of 55620215 is about 381.7193899650.

The spelling of 55620215 in words is "fifty-five million, six hundred twenty thousand, two hundred fifteen".