52421231 has 2 divisors, whose sum is σ = 52421232. Its totient is φ = 52421230.

The previous prime is 52421219. The next prime is 52421233. The reversal of 52421231 is 13212425.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52421231 is a prime.

It is a super-2 number, since 2×52421231² = 5495970919110722, which contains 22 as substring.

Together with 52421233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52421233) 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 as a sum of consecutive naturals, namely, 26210615 + 26210616.

It is an arithmetic number, because the mean of its divisors is an integer number (26210616).

Almost surely, 2^52421231 is an apocalyptic number.

52421231 is a deficient number, since it is larger than the sum of its proper divisors (1).

52421231 is an equidigital number, since it uses as much as digits as its factorization.

52421231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 20.

The square root of 52421231 is about 7240.2507553261. The cubic root of 52421231 is about 374.2562586460.

Adding to 52421231 its reverse (13212425), we get a palindrome (65633656).

The spelling of 52421231 in words is "fifty-two million, four hundred twenty-one thousand, two hundred thirty-one".