53172813 has 8 divisors (see below), whose sum is σ = 70948800. Its totient is φ = 35422688.

The previous prime is 53172809. The next prime is 53172827. The reversal of 53172813 is 31827135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53172813 - 2² = 53172809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53172853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1008 + ... + 10361.

It is an arithmetic number, because the mean of its divisors is an integer number (8868600).

Almost surely, 2^53172813 is an apocalyptic number.

It is an amenable number.

53172813 is a deficient number, since it is larger than the sum of its proper divisors (17775987).

53172813 is a wasteful number, since it uses less digits than its factorization.

53172813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12931.

The product of its digits is 5040, while the sum is 30.

The square root of 53172813 is about 7291.9690756338. The cubic root of 53172813 is about 376.0363935084.

Adding to 53172813 its reverse (31827135), we get a palindrome (84999948).

The spelling of 53172813 in words is "fifty-three million, one hundred seventy-two thousand, eight hundred thirteen".