51233137 has 4 divisors (see below), whose sum is σ = 51251056. Its totient is φ = 51215220.

The previous prime is 51233129. The next prime is 51233153. The reversal of 51233137 is 73133215.

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 a cyclic number.

It is not a de Polignac number, because 51233137 - 2³ = 51233129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51233437) 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, 3603 + ... + 10744.

It is an arithmetic number, because the mean of its divisors is an integer number (12812764).

Almost surely, 2^51233137 is an apocalyptic number.

It is an amenable number.

51233137 is a deficient number, since it is larger than the sum of its proper divisors (17919).

51233137 is a wasteful number, since it uses less digits than its factorization.

51233137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17918.

The product of its digits is 1890, while the sum is 25.

The square root of 51233137 is about 7157.7326717334. The cubic root of 51233137 is about 371.4071979178.

The spelling of 51233137 in words is "fifty-one million, two hundred thirty-three thousand, one hundred thirty-seven".