51501400 has 48 divisors (see below), whose sum is σ = 126052200. Its totient is φ = 19514880.

The previous prime is 51501397. The next prime is 51501409. The reversal of 51501400 is 410515.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51501409) 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, 2977 + ... + 10576.

Almost surely, 2^51501400 is an apocalyptic number.

51501400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51501400 is an abundant number, since it is smaller than the sum of its proper divisors (74550800).

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

51501400 is a wasteful number, since it uses less digits than its factorization.

51501400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13588 (or 13579 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 51501400 is about 7176.4475891628. The cubic root of 51501400 is about 372.0543143417.

Adding to 51501400 its reverse (410515), we get a palindrome (51911915).

The spelling of 51501400 in words is "fifty-one million, five hundred one thousand, four hundred".