51564031 has 2 divisors, whose sum is σ = 51564032. Its totient is φ = 51564030.

The previous prime is 51563989. The next prime is 51564041. The reversal of 51564031 is 13046515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51564031 - 2²³ = 43175423 is a prime.

It is a super-2 number, since 2×51564031² = 5317698585937922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51563987 and 51564005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51564041) 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 as a sum of consecutive naturals, namely, 25782015 + 25782016.

It is an arithmetic number, because the mean of its divisors is an integer number (25782016).

Almost surely, 2^51564031 is an apocalyptic number.

51564031 is a deficient number, since it is larger than the sum of its proper divisors (1).

51564031 is an equidigital number, since it uses as much as digits as its factorization.

51564031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 51564031 is about 7180.8099125377. The cubic root of 51564031 is about 372.2050720182.

It can be divided in two parts, 515 and 64031, that added together give a palindrome (64546).

The spelling of 51564031 in words is "fifty-one million, five hundred sixty-four thousand, thirty-one".