51693724 has 12 divisors (see below), whose sum is σ = 90518904. Its totient is φ = 25831184.

The previous prime is 51693713. The next prime is 51693727. The reversal of 51693724 is 42739615.

It is a super-2 number, since 2×51693724² = 5344482201976352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51693727) 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 3 ways as a sum of consecutive naturals, for example, 6687 + ... + 12169.

It is an arithmetic number, because the mean of its divisors is an integer number (7543242).

Almost surely, 2^51693724 is an apocalyptic number.

It is an amenable number.

51693724 is a deficient number, since it is larger than the sum of its proper divisors (38825180).

51693724 is a wasteful number, since it uses less digits than its factorization.

51693724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7844 (or 7842 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 51693724 is about 7189.8347686160. The cubic root of 51693724 is about 372.5168654436.

It can be divided in two parts, 516937 and 24, that added together give a square (516961 = 719²).

The spelling of 51693724 in words is "fifty-one million, six hundred ninety-three thousand, seven hundred twenty-four".