51024400 has 60 divisors (see below), whose sum is σ = 140106112. Its totient is φ = 17493120.

The previous prime is 51024397. The next prime is 51024401. The reversal of 51024400 is 442015.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (51024401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6312 + ... + 11911.

Almost surely, 2^51024400 is an apocalyptic number.

51024400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51024400 is an abundant number, since it is smaller than the sum of its proper divisors (89081712).

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

51024400 is a wasteful number, since it uses less digits than its factorization.

51024400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18248 (or 18237 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 51024400 is about 7143.1365659632. The cubic root of 51024400 is about 370.9021084690.

Adding to 51024400 its reverse (442015), we get a palindrome (51466415).

The spelling of 51024400 in words is "fifty-one million, twenty-four thousand, four hundred".