51031353131 has 8 divisors (see below), whose sum is σ = 56039248128. Its totient is φ = 46084905000.

The previous prime is 51031353119. The next prime is 51031353133. The reversal of 51031353131 is 13135313015.

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 51031353131 - 2¹⁰ = 51031352107 is a prime.

It is a super-2 number, since 2×51031353131² (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 51031353131.

It is not an unprimeable number, because it can be changed into a prime (51031353133) 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, 15359975 + ... + 15363296.

It is an arithmetic number, because the mean of its divisors is an integer number (7004906016).

Almost surely, 2^51031353131 is an apocalyptic number.

51031353131 is a deficient number, since it is larger than the sum of its proper divisors (5007894997).

51031353131 is a wasteful number, since it uses less digits than its factorization.

51031353131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30723433.

The product of its (nonzero) digits is 2025, while the sum is 26.

Adding to 51031353131 its reverse (13135313015), we get a palindrome (64166666146).

The spelling of 51031353131 in words is "fifty-one billion, thirty-one million, three hundred fifty-three thousand, one hundred thirty-one".