53331931 has 4 divisors (see below), whose sum is σ = 53346600. Its totient is φ = 53317264.

The previous prime is 53331923. The next prime is 53331947. The reversal of 53331931 is 13913335.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13913335 = 5 ⋅2782667.

It is a cyclic number.

It is not a de Polignac number, because 53331931 - 2³ = 53331923 is a prime.

It is a super-2 number, since 2×53331931² = 5688589728377522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53331931.

It is not an unprimeable number, because it can be changed into a prime (53331991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2655 + ... + 10663.

It is an arithmetic number, because the mean of its divisors is an integer number (13336650).

Almost surely, 2^53331931 is an apocalyptic number.

53331931 is a deficient number, since it is larger than the sum of its proper divisors (14669).

53331931 is an equidigital number, since it uses as much as digits as its factorization.

53331931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14668.

The product of its digits is 3645, while the sum is 28.

The square root of 53331931 is about 7302.8714215711. The cubic root of 53331931 is about 376.4111124080.

The spelling of 53331931 in words is "fifty-three million, three hundred thirty-one thousand, nine hundred thirty-one".