55766215 has 12 divisors (see below), whose sum is σ = 68785416. Its totient is φ = 43401888.

The previous prime is 55766213. The next prime is 55766219. The reversal of 55766215 is 51266755.

It is not a de Polignac number, because 55766215 - 2¹ = 55766213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55766213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2772 + ... + 10918.

It is an arithmetic number, because the mean of its divisors is an integer number (5732118).

Almost surely, 2^55766215 is an apocalyptic number.

55766215 is a deficient number, since it is larger than the sum of its proper divisors (13019201).

55766215 is an equidigital number, since it uses as much as digits as its factorization.

55766215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8226 (or 8189 counting only the distinct ones).

The product of its digits is 63000, while the sum is 37.

The square root of 55766215 is about 7467.6780193043. The cubic root of 55766215 is about 382.0530956048.

The spelling of 55766215 in words is "fifty-five million, seven hundred sixty-six thousand, two hundred fifteen".