51906000031 has 2 divisors, whose sum is σ = 51906000032. Its totient is φ = 51906000030.

The previous prime is 51905999993. The next prime is 51906000037. The reversal of 51906000031 is 13000060915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51906000031 - 2⁷ = 51905999903 is a prime.

It is a super-2 number, since 2×51906000031² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51906000037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25953000015 + 25953000016.

It is an arithmetic number, because the mean of its divisors is an integer number (25953000016).

Almost surely, 2^51906000031 is an apocalyptic number.

51906000031 is a deficient number, since it is larger than the sum of its proper divisors (1).

51906000031 is an equidigital number, since it uses as much as digits as its factorization.

51906000031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 25.

Adding to 51906000031 its reverse (13000060915), we get a palindrome (64906060946).

The spelling of 51906000031 in words is "fifty-one billion, nine hundred six million, thirty-one", and thus it is an aban number.