53245021 has 2 divisors, whose sum is σ = 53245022. Its totient is φ = 53245020.

The previous prime is 53245007. The next prime is 53245067. The reversal of 53245021 is 12054235.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27092025 + 26152996 = 5205^2 + 5114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53245021 is a prime.

It is a super-2 number, since 2×53245021² = 5670064522580882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53244983 and 53245001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53245121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26622510 + 26622511.

It is an arithmetic number, because the mean of its divisors is an integer number (26622511).

Almost surely, 2^53245021 is an apocalyptic number.

It is an amenable number.

53245021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53245021 is an equidigital number, since it uses as much as digits as its factorization.

53245021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 53245021 is about 7296.9185962295. The cubic root of 53245021 is about 376.2065340531.

Adding to 53245021 its reverse (12054235), we get a palindrome (65299256).

The spelling of 53245021 in words is "fifty-three million, two hundred forty-five thousand, twenty-one".