51663364 has 12 divisors (see below), whose sum is σ = 91343644. Its totient is φ = 25565184.

The previous prime is 51663347. The next prime is 51663371. The reversal of 51663364 is 46336615.

It can be written as a sum of positive squares in 2 ways, for example, as 13322500 + 38340864 = 3650^2 + 6192^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66189 + ... + 66964.

Almost surely, 2^51663364 is an apocalyptic number.

It is an amenable number.

51663364 is a deficient number, since it is larger than the sum of its proper divisors (39680280).

51663364 is a wasteful number, since it uses less digits than its factorization.

51663364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133254 (or 133252 counting only the distinct ones).

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

The square root of 51663364 is about 7187.7231443622. The cubic root of 51663364 is about 372.4439241144.

Adding to 51663364 its reverse (46336615), we get a palindrome (97999979).

The spelling of 51663364 in words is "fifty-one million, six hundred sixty-three thousand, three hundred sixty-four".