53213837 has 4 divisors (see below), whose sum is σ = 53484156. Its totient is φ = 52943520.

The previous prime is 53213827. The next prime is 53213857. The reversal of 53213837 is 73831235.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38613796 + 14600041 = 6214^2 + 3821^2 .

It is a cyclic number.

It is not a de Polignac number, because 53213837 - 2¹⁰ = 53212813 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 (53213827) 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, 134864 + ... + 135257.

It is an arithmetic number, because the mean of its divisors is an integer number (13371039).

Almost surely, 2^53213837 is an apocalyptic number.

It is an amenable number.

53213837 is a deficient number, since it is larger than the sum of its proper divisors (270319).

53213837 is a wasteful number, since it uses less digits than its factorization.

53213837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270318.

The product of its digits is 15120, while the sum is 32.

The square root of 53213837 is about 7294.7814909016. The cubic root of 53213837 is about 376.1330754438.

The spelling of 53213837 in words is "fifty-three million, two hundred thirteen thousand, eight hundred thirty-seven".