55615140 has 96 divisors (see below), whose sum is σ = 197756160. Its totient is φ = 12711168.

The previous prime is 55615129. The next prime is 55615141. The reversal of 55615140 is 4151655.

It is a happy number.

55615140 is a `hidden beast` number, since 5 + 5 + 615 + 1 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (55615141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3577 + ... + 11136.

It is an arithmetic number, because the mean of its divisors is an integer number (2059960).

Almost surely, 2^55615140 is an apocalyptic number.

It is an amenable number.

55615140 is an abundant number, since it is smaller than the sum of its proper divisors (142141020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55615140 is a wasteful number, since it uses less digits than its factorization.

55615140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14738 (or 14730 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 55615140 is about 7457.5558998911. Note that the first 3 decimals coincide. The cubic root of 55615140 is about 381.7077797688.

Adding to 55615140 its reverse (4151655), we get a palindrome (59766795).

It can be divided in two parts, 55615 and 140, that added together give a palindrome (55755).

The spelling of 55615140 in words is "fifty-five million, six hundred fifteen thousand, one hundred forty".