51013724 has 36 divisors (see below), whose sum is σ = 96424272. Its totient is φ = 23569920.

The previous prime is 51013723. The next prime is 51013759. The reversal of 51013724 is 42731015.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 51013724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51013723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88124 + ... + 88700.

It is an arithmetic number, because the mean of its divisors is an integer number (2678452).

Almost surely, 2^51013724 is an apocalyptic number.

It is an amenable number.

51013724 is a deficient number, since it is larger than the sum of its proper divisors (45410548).

51013724 is a wasteful number, since it uses less digits than its factorization.

51013724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666 (or 633 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 51013724 is about 7142.3892361030. The cubic root of 51013724 is about 370.8762383159.

Adding to 51013724 its reverse (42731015), we get a palindrome (93744739).

The spelling of 51013724 in words is "fifty-one million, thirteen thousand, seven hundred twenty-four".