51612031 has 2 divisors, whose sum is σ = 51612032. Its totient is φ = 51612030.

The previous prime is 51612007. The next prime is 51612047. The reversal of 51612031 is 13021615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51612031 - 2⁹ = 51611519 is a prime.

It is a super-2 number, since 2×51612031² = 5327603487889922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51612061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25806015 + 25806016.

It is an arithmetic number, because the mean of its divisors is an integer number (25806016).

Almost surely, 2^51612031 is an apocalyptic number.

51612031 is a deficient number, since it is larger than the sum of its proper divisors (1).

51612031 is an equidigital number, since it uses as much as digits as its factorization.

51612031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 51612031 is about 7184.1513764675. The cubic root of 51612031 is about 372.3205291325.

Adding to 51612031 its reverse (13021615), we get a palindrome (64633646).

The spelling of 51612031 in words is "fifty-one million, six hundred twelve thousand, thirty-one".