51112031 has 4 divisors (see below), whose sum is σ = 51141552. Its totient is φ = 51082512.

The previous prime is 51111989. The next prime is 51112043. The reversal of 51112031 is 13021115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51112031 is a prime.

It is a super-2 number, since 2×51112031² = 5224879425889922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51111997 and 51112015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51112091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11990 + ... + 15683.

It is an arithmetic number, because the mean of its divisors is an integer number (12785388).

Almost surely, 2^51112031 is an apocalyptic number.

51112031 is a deficient number, since it is larger than the sum of its proper divisors (29521).

51112031 is a wasteful number, since it uses less digits than its factorization.

51112031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29520.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 51112031 is about 7149.2678646138. The cubic root of 51112031 is about 371.1143202306.

Adding to 51112031 its reverse (13021115), we get a palindrome (64133146).

The spelling of 51112031 in words is "fifty-one million, one hundred twelve thousand, thirty-one".