51806937 has 32 divisors (see below), whose sum is σ = 85845760. Its totient is φ = 27060480.

The previous prime is 51806929. The next prime is 51806957. The reversal of 51806937 is 73960815.

It is not a de Polignac number, because 51806937 - 2³ = 51806929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 51806895 and 51806904.

It is not an unprimeable number, because it can be changed into a prime (51806957) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28887 + ... + 30627.

It is an arithmetic number, because the mean of its divisors is an integer number (2682680).

Almost surely, 2^51806937 is an apocalyptic number.

It is an amenable number.

51806937 is a deficient number, since it is larger than the sum of its proper divisors (34038823).

51806937 is a wasteful number, since it uses less digits than its factorization.

51806937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 51806937 is about 7197.7035921188. The cubic root of 51806937 is about 372.7886134636.

The spelling of 51806937 in words is "fifty-one million, eight hundred six thousand, nine hundred thirty-seven".