56310231 has 4 divisors (see below), whose sum is σ = 75080312. Its totient is φ = 37540152.

The previous prime is 56310139. The next prime is 56310251. The reversal of 56310231 is 13201365.

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

It is not a de Polignac number, because 56310231 - 2¹³ = 56302039 is a prime.

It is a super-2 number, since 2×56310231² = 6341684230546722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56310198 and 56310207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56310251) 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, 9385036 + ... + 9385041.

It is an arithmetic number, because the mean of its divisors is an integer number (18770078).

Almost surely, 2^56310231 is an apocalyptic number.

56310231 is a deficient number, since it is larger than the sum of its proper divisors (18770081).

56310231 is a wasteful number, since it uses less digits than its factorization.

56310231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18770080.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 56310231 is about 7504.0143256793. The cubic root of 56310231 is about 383.2914246980.

Adding to 56310231 its reverse (13201365), we get a palindrome (69511596).

The spelling of 56310231 in words is "fifty-six million, three hundred ten thousand, two hundred thirty-one".