51442724 has 12 divisors (see below), whose sum is σ = 90136284. Its totient is φ = 25689504.

The previous prime is 51442717. The next prime is 51442739. The reversal of 51442724 is 42724415.

It can be written as a sum of positive squares in 2 ways, for example, as 2190400 + 49252324 = 1480^2 + 7018^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4127 + ... + 10950.

It is an arithmetic number, because the mean of its divisors is an integer number (7511357).

Almost surely, 2^51442724 is an apocalyptic number.

It is an amenable number.

51442724 is a deficient number, since it is larger than the sum of its proper divisors (38693560).

51442724 is a wasteful number, since it uses less digits than its factorization.

51442724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15934 (or 15932 counting only the distinct ones).

The product of its digits is 8960, while the sum is 29.

The square root of 51442724 is about 7172.3583290296. The cubic root of 51442724 is about 371.9129657258.

The spelling of 51442724 in words is "fifty-one million, four hundred forty-two thousand, seven hundred twenty-four".