53253521 has 2 divisors, whose sum is σ = 53253522. Its totient is φ = 53253520.

The previous prime is 53253517. The next prime is 53253539. The reversal of 53253521 is 12535235.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27447121 + 25806400 = 5239^2 + 5080^2 .

It is a cyclic number.

It is not a de Polignac number, because 53253521 - 2² = 53253517 is a prime.

It is equal to p_3184316 and since 53253521 and 3184316 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (53253511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26626760 + 26626761.

It is an arithmetic number, because the mean of its divisors is an integer number (26626761).

Almost surely, 2^53253521 is an apocalyptic number.

It is an amenable number.

53253521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53253521 is an equidigital number, since it uses as much as digits as its factorization.

53253521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4500, while the sum is 26.

The square root of 53253521 is about 7297.5010106200. The cubic root of 53253521 is about 376.2265521088.

Adding to 53253521 its reverse (12535235), we get a palindrome (65788756).

The spelling of 53253521 in words is "fifty-three million, two hundred fifty-three thousand, five hundred twenty-one".