56000031 has 4 divisors (see below), whose sum is σ = 74666712. Its totient is φ = 37333352.

The previous prime is 56000029. The next prime is 56000039. The reversal of 56000031 is 13000065.

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 56000031 - 2¹ = 56000029 is a prime.

It is a super-2 number, since 2×56000031² = 6272006944001922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56000039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9333336 + ... + 9333341.

It is an arithmetic number, because the mean of its divisors is an integer number (18666678).

Almost surely, 2^56000031 is an apocalyptic number.

56000031 is a deficient number, since it is larger than the sum of its proper divisors (18666681).

56000031 is a wasteful number, since it uses less digits than its factorization.

56000031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18666680.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 56000031 is about 7483.3168448222. The cubic root of 56000031 is about 382.5863071507.

Adding to 56000031 its reverse (13000065), we get a palindrome (69000096).

The spelling of 56000031 in words is "fifty-six million, thirty-one", and thus it is an aban number and an uban number.