51319737 has 20 divisors (see below), whose sum is σ = 87615616. Its totient is φ = 29325240.

The previous prime is 51319699. The next prime is 51319757. The reversal of 51319737 is 73791315.

It is not a de Polignac number, because 51319737 - 2¹⁰ = 51318713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51319757) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 44689 + ... + 45822.

Almost surely, 2^51319737 is an apocalyptic number.

It is an amenable number.

51319737 is a deficient number, since it is larger than the sum of its proper divisors (36295879).

51319737 is an equidigital number, since it uses as much as digits as its factorization.

51319737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90530 (or 90521 counting only the distinct ones).

The product of its digits is 19845, while the sum is 36.

The square root of 51319737 is about 7163.7795192203. The cubic root of 51319737 is about 371.6163448351.

The spelling of 51319737 in words is "fifty-one million, three hundred nineteen thousand, seven hundred thirty-seven".