51343731 has 6 divisors (see below), whose sum is σ = 74163180. Its totient is φ = 34229148.

The previous prime is 51343729. The next prime is 51343739. The reversal of 51343731 is 13734315.

It is not a de Polignac number, because 51343731 - 2¹ = 51343729 is a prime.

It is a super-2 number, since 2×51343731² = 5272357426000722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51343695 and 51343704.

It is not an unprimeable number, because it can be changed into a prime (51343739) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2852421 + ... + 2852438.

It is an arithmetic number, because the mean of its divisors is an integer number (12360530).

Almost surely, 2^51343731 is an apocalyptic number.

51343731 is a deficient number, since it is larger than the sum of its proper divisors (22819449).

51343731 is a wasteful number, since it uses less digits than its factorization.

51343731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5704865 (or 5704862 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 51343731 is about 7165.4539981776. The cubic root of 51343731 is about 371.6742509082.

It can be divided in two parts, 513 and 43731, that added together give a palindrome (44244).

The spelling of 51343731 in words is "fifty-one million, three hundred forty-three thousand, seven hundred thirty-one".