51246664 has 32 divisors (see below), whose sum is σ = 111369600. Its totient is φ = 21651840.

The previous prime is 51246661. The next prime is 51246673. The reversal of 51246664 is 46664215.

51246664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51246664² = 5252441142257792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51246661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2469 + ... + 10420.

It is an arithmetic number, because the mean of its divisors is an integer number (3480300).

Almost surely, 2^51246664 is an apocalyptic number.

It is an amenable number.

51246664 is an abundant number, since it is smaller than the sum of its proper divisors (60122936).

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

51246664 is a wasteful number, since it uses less digits than its factorization.

51246664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12973 (or 12969 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 51246664 is about 7158.6775314998. The cubic root of 51246664 is about 371.4398823831.

The spelling of 51246664 in words is "fifty-one million, two hundred forty-six thousand, six hundred sixty-four".