53821237 has 4 divisors (see below), whose sum is σ = 54426060. Its totient is φ = 53216416.

The previous prime is 53821231. The next prime is 53821241. The reversal of 53821237 is 73212835.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73212835 = 5 ⋅14642567.

It can be written as a sum of positive squares in 2 ways, for example, as 26687556 + 27133681 = 5166^2 + 5209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53821237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53821199 and 53821208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53821231) 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, 302278 + ... + 302455.

It is an arithmetic number, because the mean of its divisors is an integer number (13606515).

Almost surely, 2^53821237 is an apocalyptic number.

It is an amenable number.

53821237 is a deficient number, since it is larger than the sum of its proper divisors (604823).

53821237 is an equidigital number, since it uses as much as digits as its factorization.

53821237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604822.

The product of its digits is 10080, while the sum is 31.

The square root of 53821237 is about 7336.2958637176. The cubic root of 53821237 is about 377.5587663435.

The spelling of 53821237 in words is "fifty-three million, eight hundred twenty-one thousand, two hundred thirty-seven".