53181373 has 4 divisors (see below), whose sum is σ = 60778720. Its totient is φ = 45584028.

The previous prime is 53181371. The next prime is 53181379. The reversal of 53181373 is 37318135.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 53181373 - 2¹ = 53181371 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53181371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3798663 + ... + 3798676.

It is an arithmetic number, because the mean of its divisors is an integer number (15194680).

Almost surely, 2^53181373 is an apocalyptic number.

It is an amenable number.

53181373 is a deficient number, since it is larger than the sum of its proper divisors (7597347).

53181373 is an equidigital number, since it uses as much as digits as its factorization.

53181373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7597346.

The product of its digits is 7560, while the sum is 31.

The square root of 53181373 is about 7292.5559990994. Note that the first 3 decimals coincide. The cubic root of 53181373 is about 376.0565711056.

The spelling of 53181373 in words is "fifty-three million, one hundred eighty-one thousand, three hundred seventy-three".