51336646 has 4 divisors (see below), whose sum is σ = 77004972. Its totient is φ = 25668322.

The previous prime is 51336631. The next prime is 51336647. The reversal of 51336646 is 64663315.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51336647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12834160 + ... + 12834163.

It is an arithmetic number, because the mean of its divisors is an integer number (19251243).

Almost surely, 2^51336646 is an apocalyptic number.

51336646 is a deficient number, since it is larger than the sum of its proper divisors (25668326).

51336646 is a wasteful number, since it uses less digits than its factorization.

51336646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25668325.

The product of its digits is 38880, while the sum is 34.

The square root of 51336646 is about 7164.9595951408. The cubic root of 51336646 is about 371.6571541556.

The spelling of 51336646 in words is "fifty-one million, three hundred thirty-six thousand, six hundred forty-six".