55571615 has 16 divisors (see below), whose sum is σ = 73750176. Its totient is φ = 39859200.

The previous prime is 55571603. The next prime is 55571617. The reversal of 55571615 is 51617555.

It is not a de Polignac number, because 55571615 - 2¹⁴ = 55555231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55571617) 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, 2906 + ... + 10935.

It is an arithmetic number, because the mean of its divisors is an integer number (4609386).

Almost surely, 2^55571615 is an apocalyptic number.

55571615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55571615 is a deficient number, since it is larger than the sum of its proper divisors (18178561).

55571615 is a wasteful number, since it uses less digits than its factorization.

55571615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13930.

The product of its digits is 26250, while the sum is 35.

The square root of 55571615 is about 7454.6371474405. The cubic root of 55571615 is about 381.6081775918.

The spelling of 55571615 in words is "fifty-five million, five hundred seventy-one thousand, six hundred fifteen".