51236646 has 8 divisors (see below), whose sum is σ = 102473304. Its totient is φ = 17078880.

The previous prime is 51236641. The next prime is 51236671. The reversal of 51236646 is 64663215.

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

51236646 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51236641) 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, 4269715 + ... + 4269726.

It is an arithmetic number, because the mean of its divisors is an integer number (12809163).

Almost surely, 2^51236646 is an apocalyptic number.

51236646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51236646 is a wasteful number, since it uses less digits than its factorization.

51236646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8539446.

The product of its digits is 25920, while the sum is 33.

The square root of 51236646 is about 7157.9777870569. The cubic root of 51236646 is about 371.4156770531.

The spelling of 51236646 in words is "fifty-one million, two hundred thirty-six thousand, six hundred forty-six".