51742757 has 16 divisors (see below), whose sum is σ = 61473600. Its totient is φ = 43021440.

The previous prime is 51742753. The next prime is 51742777. The reversal of 51742757 is 75724715.

It is not a de Polignac number, because 51742757 - 2² = 51742753 is a prime.

It is a super-2 number, since 2×51742757² = 5354625803922098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51742757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51742753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1793 + ... + 10329.

It is an arithmetic number, because the mean of its divisors is an integer number (3842100).

Almost surely, 2^51742757 is an apocalyptic number.

It is an amenable number.

51742757 is a deficient number, since it is larger than the sum of its proper divisors (9730843).

51742757 is a wasteful number, since it uses less digits than its factorization.

51742757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8596.

The product of its digits is 68600, while the sum is 38.

The square root of 51742757 is about 7193.2438440526. The cubic root of 51742757 is about 372.6346092491.

The spelling of 51742757 in words is "fifty-one million, seven hundred forty-two thousand, seven hundred fifty-seven".