53172504 has 256 divisors, whose sum is σ = 193536000. Its totient is φ = 13115520.

The previous prime is 53172503. The next prime is 53172517. The reversal of 53172504 is 40527135.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53172503) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 382467 + ... + 382605.

It is an arithmetic number, because the mean of its divisors is an integer number (756000).

Almost surely, 2^53172504 is an apocalyptic number.

53172504 is a gapful number since it is divisible by the number (54) 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 53172504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96768000).

53172504 is an abundant number, since it is smaller than the sum of its proper divisors (140363496).

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

53172504 is a wasteful number, since it uses less digits than its factorization.

53172504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 53172504 is about 7291.9478879103. The cubic root of 53172504 is about 376.0356650944.

Adding to 53172504 its reverse (40527135), we get a palindrome (93699639).

The spelling of 53172504 in words is "fifty-three million, one hundred seventy-two thousand, five hundred four".