51031324531 has 8 divisors (see below), whose sum is σ = 56108888064. Its totient is φ = 46026819720.

The previous prime is 51031324517. The next prime is 51031324607. The reversal of 51031324531 is 13542313015.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51031324531 - 2¹³ = 51031316339 is a prime.

It is a super-2 number, since 2×51031324531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51031324531.

It is not an unprimeable number, because it can be changed into a prime (51031325531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18263215 + ... + 18266008.

It is an arithmetic number, because the mean of its divisors is an integer number (7013611008).

Almost surely, 2^51031324531 is an apocalyptic number.

51031324531 is a deficient number, since it is larger than the sum of its proper divisors (5077563533).

51031324531 is a wasteful number, since it uses less digits than its factorization.

51031324531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36529361.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 51031324531 its reverse (13542313015), we get a palindrome (64573637546).

The spelling of 51031324531 in words is "fifty-one billion, thirty-one million, three hundred twenty-four thousand, five hundred thirty-one".