51918937 has 4 divisors (see below), whose sum is σ = 59335936. Its totient is φ = 44501940.

The previous prime is 51918917. The next prime is 51918967. The reversal of 51918937 is 73981915.

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 51918937 - 2⁷ = 51918809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51918893 and 51918902.

It is not an unprimeable number, because it can be changed into a prime (51918917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3708489 + ... + 3708502.

It is an arithmetic number, because the mean of its divisors is an integer number (14833984).

Almost surely, 2^51918937 is an apocalyptic number.

It is an amenable number.

51918937 is a deficient number, since it is larger than the sum of its proper divisors (7416999).

51918937 is an equidigital number, since it uses as much as digits as its factorization.

51918937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7416998.

The product of its digits is 68040, while the sum is 43.

The square root of 51918937 is about 7205.4796509323. The cubic root of 51918937 is about 373.0570606091.

The spelling of 51918937 in words is "fifty-one million, nine hundred eighteen thousand, nine hundred thirty-seven".