51637242 has 16 divisors (see below), whose sum is σ = 103466592. Its totient is φ = 17180400.

The previous prime is 51637219. The next prime is 51637247. The reversal of 51637242 is 24273615.

It is a super-2 number, since 2×51637242² = 5332809522733128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51637247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4384 + ... + 11067.

It is an arithmetic number, because the mean of its divisors is an integer number (6466662).

Almost surely, 2^51637242 is an apocalyptic number.

51637242 is an abundant number, since it is smaller than the sum of its proper divisors (51829350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51637242 is a wasteful number, since it uses less digits than its factorization.

51637242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16013.

The product of its digits is 10080, while the sum is 30.

The square root of 51637242 is about 7185.9057884167. The cubic root of 51637242 is about 372.3811419053.

The spelling of 51637242 in words is "fifty-one million, six hundred thirty-seven thousand, two hundred forty-two".