55015977 has 8 divisors (see below), whose sum is σ = 76544064. Its totient is φ = 35082608.

The previous prime is 55015951. The next prime is 55016009. The reversal of 55015977 is 77951055.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55015977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55015277) 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, 398598 + ... + 398735.

It is an arithmetic number, because the mean of its divisors is an integer number (9568008).

Almost surely, 2^55015977 is an apocalyptic number.

It is an amenable number.

55015977 is a deficient number, since it is larger than the sum of its proper divisors (21528087).

55015977 is a wasteful number, since it uses less digits than its factorization.

55015977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797359.

The product of its (nonzero) digits is 55125, while the sum is 39.

The square root of 55015977 is about 7417.2755780003. The cubic root of 55015977 is about 380.3320666149.

The spelling of 55015977 in words is "fifty-five million, fifteen thousand, nine hundred seventy-seven".