53213131 has 4 divisors (see below), whose sum is σ = 53942152. Its totient is φ = 52484112.

The previous prime is 53213123. The next prime is 53213159. The reversal of 53213131 is 13131235.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53213131 - 2³ = 53213123 is a prime.

It is a super-2 number, since 2×53213131² = 5663274621646322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53213099 and 53213108.

It is not an unprimeable number, because it can be changed into a prime (53213161) 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, 364401 + ... + 364546.

It is an arithmetic number, because the mean of its divisors is an integer number (13485538).

Almost surely, 2^53213131 is an apocalyptic number.

53213131 is a deficient number, since it is larger than the sum of its proper divisors (729021).

53213131 is an equidigital number, since it uses as much as digits as its factorization.

53213131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729020.

The product of its digits is 270, while the sum is 19.

The square root of 53213131 is about 7294.7330999839. The cubic root of 53213131 is about 376.1314120222.

Adding to 53213131 its reverse (13131235), we get a palindrome (66344366).

The spelling of 53213131 in words is "fifty-three million, two hundred thirteen thousand, one hundred thirty-one".