51613621031 has 8 divisors (see below), whose sum is σ = 59528161440. Its totient is φ = 43834372128.

The previous prime is 51613621019. The next prime is 51613621079. The reversal of 51613621031 is 13012631615.

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 51613621031 - 2²⁶ = 51546512167 is a prime.

It is a super-2 number, since 2×51613621031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51613620985 and 51613621003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51613627031) 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, 33822056 + ... + 33823581.

It is an arithmetic number, because the mean of its divisors is an integer number (7441020180).

Almost surely, 2^51613621031 is an apocalyptic number.

51613621031 is a deficient number, since it is larger than the sum of its proper divisors (7914540409).

51613621031 is a wasteful number, since it uses less digits than its factorization.

51613621031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67645753.

The product of its (nonzero) digits is 3240, while the sum is 29.

The spelling of 51613621031 in words is "fifty-one billion, six hundred thirteen million, six hundred twenty-one thousand, thirty-one".