56951999 has 8 divisors (see below), whose sum is σ = 61452720. Its totient is φ = 52468416.

The previous prime is 56951977. The next prime is 56952017. The reversal of 56951999 is 99915965.

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

It is not a de Polignac number, because 56951999 - 2²⁰ = 55903423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56951999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56954999) 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, 3107 + ... + 11115.

It is an arithmetic number, because the mean of its divisors is an integer number (7681590).

Almost surely, 2^56951999 is an apocalyptic number.

56951999 is a deficient number, since it is larger than the sum of its proper divisors (4500721).

56951999 is a wasteful number, since it uses less digits than its factorization.

56951999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8569.

The product of its digits is 984150, while the sum is 53.

The square root of 56951999 is about 7546.6548218399. The cubic root of 56951999 is about 384.7420524360.

The spelling of 56951999 in words is "fifty-six million, nine hundred fifty-one thousand, nine hundred ninety-nine".