51233051531 has 2 divisors, whose sum is σ = 51233051532. Its totient is φ = 51233051530.

The previous prime is 51233051431. The next prime is 51233051539. The reversal of 51233051531 is 13515033215.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51233051531 - 2³⁴ = 34053182347 is a prime.

It is a super-4 number, since 4×51233051531⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 51233051494 and 51233051503.

It is not a weakly prime, because it can be changed into another prime (51233051539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25616525765 + 25616525766.

It is an arithmetic number, because the mean of its divisors is an integer number (25616525766).

Almost surely, 2^51233051531 is an apocalyptic number.

51233051531 is a deficient number, since it is larger than the sum of its proper divisors (1).

51233051531 is an equidigital number, since it uses as much as digits as its factorization.

51233051531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 29.

Adding to 51233051531 its reverse (13515033215), we get a palindrome (64748084746).

The spelling of 51233051531 in words is "fifty-one billion, two hundred thirty-three million, fifty-one thousand, five hundred thirty-one".