51927637 has 4 divisors (see below), whose sum is σ = 51972076. Its totient is φ = 51883200.

The previous prime is 51927599. The next prime is 51927643. The reversal of 51927637 is 73672915.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 576081 + 51351556 = 759^2 + 7166^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51927637 is a prime.

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 51927637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51927647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20418 + ... + 22819.

It is an arithmetic number, because the mean of its divisors is an integer number (12993019).

Almost surely, 2^51927637 is an apocalyptic number.

It is an amenable number.

51927637 is a deficient number, since it is larger than the sum of its proper divisors (44439).

51927637 is a wasteful number, since it uses less digits than its factorization.

51927637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44438.

The product of its digits is 79380, while the sum is 40.

The square root of 51927637 is about 7206.0833328515. The cubic root of 51927637 is about 373.0778970344.

The spelling of 51927637 in words is "fifty-one million, nine hundred twenty-seven thousand, six hundred thirty-seven".