56691319 has 4 divisors (see below), whose sum is σ = 56976400. Its totient is φ = 56406240.

The previous prime is 56691301. The next prime is 56691331. The reversal of 56691319 is 91319665.

56691319 = 161² + 162² + ... + 558².

56691319 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56691319 - 2¹³ = 56683127 is a prime.

It is a super-2 number, since 2×56691319² = 6427811299919522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56691419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142242 + ... + 142639.

It is an arithmetic number, because the mean of its divisors is an integer number (14244100).

Almost surely, 2^56691319 is an apocalyptic number.

56691319 is a deficient number, since it is larger than the sum of its proper divisors (285081).

56691319 is a wasteful number, since it uses less digits than its factorization.

56691319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285080.

The product of its digits is 43740, while the sum is 40.

The square root of 56691319 is about 7529.3637845438. The cubic root of 56691319 is about 384.1541423091.

The spelling of 56691319 in words is "fifty-six million, six hundred ninety-one thousand, three hundred nineteen".