51660272 has 20 divisors (see below), whose sum is σ = 100205640. Its totient is φ = 25800768.

The previous prime is 51660269. The next prime is 51660293. The reversal of 51660272 is 27206615.

It is a super-2 number, since 2×51660272² = 5337567406227968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 22238 + ... + 24450.

It is an arithmetic number, because the mean of its divisors is an integer number (5010282).

Almost surely, 2^51660272 is an apocalyptic number.

It is an amenable number.

51660272 is a deficient number, since it is larger than the sum of its proper divisors (48545368).

51660272 is a wasteful number, since it uses less digits than its factorization.

51660272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680 (or 3674 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 51660272 is about 7187.5080521694. The cubic root of 51660272 is about 372.4364938356.

Adding to 51660272 its reverse (27206615), we get a palindrome (78866887).

The spelling of 51660272 in words is "fifty-one million, six hundred sixty thousand, two hundred seventy-two".