56005031 has 2 divisors, whose sum is σ = 56005032. Its totient is φ = 56005030.

The previous prime is 56005009. The next prime is 56005039. The reversal of 56005031 is 13050065.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56005031 - 2¹⁰ = 56004007 is a prime.

It is a super-2 number, since 2×56005031² = 6273126994621922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 56004994 and 56005012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56005039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28002515 + 28002516.

It is an arithmetic number, because the mean of its divisors is an integer number (28002516).

Almost surely, 2^56005031 is an apocalyptic number.

56005031 is a deficient number, since it is larger than the sum of its proper divisors (1).

56005031 is an equidigital number, since it uses as much as digits as its factorization.

56005031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 56005031 is about 7483.6509138254. The cubic root of 56005031 is about 382.5976933028.

Adding to 56005031 its reverse (13050065), we get a palindrome (69055096).

The spelling of 56005031 in words is "fifty-six million, five thousand, thirty-one".