51312837 has 4 divisors (see below), whose sum is σ = 68417120. Its totient is φ = 34208556.

The previous prime is 51312829. The next prime is 51312847. The reversal of 51312837 is 73821315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51312837 - 2³ = 51312829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51312847) 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, 8552137 + ... + 8552142.

It is an arithmetic number, because the mean of its divisors is an integer number (17104280).

Almost surely, 2^51312837 is an apocalyptic number.

It is an amenable number.

51312837 is a deficient number, since it is larger than the sum of its proper divisors (17104283).

51312837 is a wasteful number, since it uses less digits than its factorization.

51312837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17104282.

The product of its digits is 5040, while the sum is 30.

The square root of 51312837 is about 7163.2979136708. The cubic root of 51312837 is about 371.5996893347.

The spelling of 51312837 in words is "fifty-one million, three hundred twelve thousand, eight hundred thirty-seven".