51623400 has 96 divisors (see below), whose sum is σ = 161864640. Its totient is φ = 13608960.

The previous prime is 51623389. The next prime is 51623413. The reversal of 51623400 is 432615.

It is a happy number.

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, 57757 + ... + 58643.

It is an arithmetic number, because the mean of its divisors is an integer number (1686090).

Almost surely, 2^51623400 is an apocalyptic number.

51623400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51623400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80932320).

51623400 is an abundant number, since it is smaller than the sum of its proper divisors (110241240).

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

51623400 is a wasteful number, since it uses less digits than its factorization.

51623400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 51623400 is about 7184.9425884971. The cubic root of 51623400 is about 372.3478651447.

The spelling of 51623400 in words is "fifty-one million, six hundred twenty-three thousand, four hundred".