53172400 has 60 divisors (see below), whose sum is σ = 128458792. Its totient is φ = 21150720.

The previous prime is 53172349. The next prime is 53172403. The reversal of 53172400 is 427135.

It is not an unprimeable number, because it can be changed into a prime (53172403) 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, 122584 + ... + 123016.

Almost surely, 2^53172400 is an apocalyptic number.

53172400 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 53172400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64229396).

53172400 is an abundant number, since it is smaller than the sum of its proper divisors (75286392).

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

53172400 is a wasteful number, since it uses less digits than its factorization.

53172400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 53172400 is about 7291.9407567533. The cubic root of 53172400 is about 376.0354199317.

Adding to 53172400 its reverse (427135), we get a palindrome (53599535).

The spelling of 53172400 in words is "fifty-three million, one hundred seventy-two thousand, four hundred".