51623264 has 144 divisors (see below), whose sum is σ = 133929936. Its totient is φ = 19353600.

The previous prime is 51623227. The next prime is 51623279. The reversal of 51623264 is 46232615.

It is a super-2 number, since 2×51623264² = 5329922772027392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 707132 + ... + 707204.

It is an arithmetic number, because the mean of its divisors is an integer number (930069).

Almost surely, 2^51623264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51623264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66964968).

51623264 is an abundant number, since it is smaller than the sum of its proper divisors (82306672).

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

51623264 is a wasteful number, since it uses less digits than its factorization.

51623264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 134 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 51623264 is about 7184.9331242538. The cubic root of 51623264 is about 372.3475381654.

Adding to 51623264 its reverse (46232615), we get a palindrome (97855879).

The spelling of 51623264 in words is "fifty-one million, six hundred twenty-three thousand, two hundred sixty-four".