53435021 has 2 divisors, whose sum is σ = 53435022. Its totient is φ = 53435020.

The previous prime is 53435017. The next prime is 53435059. The reversal of 53435021 is 12053435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32376100 + 21058921 = 5690^2 + 4589^2 .

It is a cyclic number.

It is not a de Polignac number, because 53435021 - 2² = 53435017 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53435321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26717510 + 26717511.

It is an arithmetic number, because the mean of its divisors is an integer number (26717511).

Almost surely, 2^53435021 is an apocalyptic number.

It is an amenable number.

53435021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53435021 is an equidigital number, since it uses as much as digits as its factorization.

53435021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 53435021 is about 7309.9261966179. The cubic root of 53435021 is about 376.6534890666.

Adding to 53435021 its reverse (12053435), we get a palindrome (65488456).

The spelling of 53435021 in words is "fifty-three million, four hundred thirty-five thousand, twenty-one".