53172399 has 24 divisors (see below), whose sum is σ = 85322160. Its totient is φ = 29334144.

The previous prime is 53172349. The next prime is 53172403. The reversal of 53172399 is 99327135.

It is not a de Polignac number, because 53172399 - 2⁸ = 53172143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53172349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1974 + ... + 10499.

It is an arithmetic number, because the mean of its divisors is an integer number (3555090).

Almost surely, 2^53172399 is an apocalyptic number.

53172399 is a deficient number, since it is larger than the sum of its proper divisors (32149761).

53172399 is a wasteful number, since it uses less digits than its factorization.

53172399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12519 (or 12512 counting only the distinct ones).

The product of its digits is 51030, while the sum is 39.

The square root of 53172399 is about 7291.9406881845. The cubic root of 53172399 is about 376.0354175744.

The spelling of 53172399 in words is "fifty-three million, one hundred seventy-two thousand, three hundred ninety-nine".