53251321 has 2 divisors, whose sum is σ = 53251322. Its totient is φ = 53251320.

The previous prime is 53251313. The next prime is 53251339. The reversal of 53251321 is 12315235.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35569296 + 17682025 = 5964^2 + 4205^2 .

It is a cyclic number.

It is not a de Polignac number, because 53251321 - 2³ = 53251313 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 53251292 and 53251301.

It is not a weakly prime, because it can be changed into another prime (53251301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26625660 + 26625661.

It is an arithmetic number, because the mean of its divisors is an integer number (26625661).

Almost surely, 2^53251321 is an apocalyptic number.

It is an amenable number.

53251321 is a deficient number, since it is larger than the sum of its proper divisors (1).

53251321 is an equidigital number, since it uses as much as digits as its factorization.

53251321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 22.

The square root of 53251321 is about 7297.3502725304. The cubic root of 53251321 is about 376.2213711693.

Adding to 53251321 its reverse (12315235), we get a palindrome (65566556).

The spelling of 53251321 in words is "fifty-three million, two hundred fifty-one thousand, three hundred twenty-one".