51667237 has 4 divisors (see below), whose sum is σ = 51694060. Its totient is φ = 51640416.

The previous prime is 51667211. The next prime is 51667247. The reversal of 51667237 is 73276615.

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 22572001 + 29095236 = 4751^2 + 5394^2 .

It is a cyclic number.

It is not a de Polignac number, because 51667237 - 2²³ = 43278629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51667196 and 51667205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51667247) 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, 10278 + ... + 14455.

It is an arithmetic number, because the mean of its divisors is an integer number (12923515).

Almost surely, 2^51667237 is an apocalyptic number.

It is an amenable number.

51667237 is a deficient number, since it is larger than the sum of its proper divisors (26823).

51667237 is a wasteful number, since it uses less digits than its factorization.

51667237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26822.

The product of its digits is 52920, while the sum is 37.

The square root of 51667237 is about 7187.9925570357. The cubic root of 51667237 is about 372.4532307691.

It can be divided in two parts, 5166 and 7237, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 51667237 in words is "fifty-one million, six hundred sixty-seven thousand, two hundred thirty-seven".