51646937 has 8 divisors (see below), whose sum is σ = 55040256. Its totient is φ = 48349312.

The previous prime is 51646897. The next prime is 51646939. The reversal of 51646937 is 73964615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51646937 - 2⁶ = 51646873 is a prime.

It is a super-2 number, since 2×51646937² = 5334812202963938, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51646894 and 51646903.

It is not an unprimeable number, because it can be changed into a prime (51646939) 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 7 ways as a sum of consecutive naturals, for example, 22808 + ... + 24969.

It is an arithmetic number, because the mean of its divisors is an integer number (6880032).

Almost surely, 2^51646937 is an apocalyptic number.

It is an amenable number.

51646937 is a deficient number, since it is larger than the sum of its proper divisors (3393319).

51646937 is a wasteful number, since it uses less digits than its factorization.

51646937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47847.

The product of its digits is 136080, while the sum is 41.

The square root of 51646937 is about 7186.5803411637. The cubic root of 51646937 is about 372.4044455592.

The spelling of 51646937 in words is "fifty-one million, six hundred forty-six thousand, nine hundred thirty-seven".