51661024 has 24 divisors (see below), whose sum is σ = 101976840. Its totient is φ = 25762176.

The previous prime is 51661003. The next prime is 51661063. The reversal of 51661024 is 42016615.

It is a super-2 number, since 2×51661024² = 5337722801457152, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51661024.

It is a congruent number.

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, 11482 + ... + 15334.

It is an arithmetic number, because the mean of its divisors is an integer number (4249035).

Almost surely, 2^51661024 is an apocalyptic number.

It is an amenable number.

51661024 is a deficient number, since it is larger than the sum of its proper divisors (50315816).

51661024 is a wasteful number, since it uses less digits than its factorization.

51661024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282 (or 4274 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 51661024 is about 7187.5603649639. The cubic root of 51661024 is about 372.4383009682.

Adding to 51661024 its reverse (42016615), we get a palindrome (93677639).

The spelling of 51661024 in words is "fifty-one million, six hundred sixty-one thousand, twenty-four".