55916515 has 8 divisors (see below), whose sum is σ = 67153968. Its totient is φ = 44697120.

The previous prime is 55916513. The next prime is 55916521. The reversal of 55916515 is 51561955.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55916515 - 2¹ = 55916513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55916513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3645 + ... + 11185.

It is an arithmetic number, because the mean of its divisors is an integer number (8394246).

Almost surely, 2^55916515 is an apocalyptic number.

55916515 is a deficient number, since it is larger than the sum of its proper divisors (11237453).

55916515 is a wasteful number, since it uses less digits than its factorization.

55916515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9029.

The product of its digits is 33750, while the sum is 37.

The square root of 55916515 is about 7477.7346168475. The cubic root of 55916515 is about 382.3960216895.

The spelling of 55916515 in words is "fifty-five million, nine hundred sixteen thousand, five hundred fifteen".