53202661 has 2 divisors, whose sum is σ = 53202662. Its totient is φ = 53202660.

The previous prime is 53202649. The next prime is 53202691. The reversal of 53202661 is 16620235.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53202436 + 225 = 7294^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 53202661 - 2²³ = 44814053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53202631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26601330 + 26601331.

It is an arithmetic number, because the mean of its divisors is an integer number (26601331).

Almost surely, 2^53202661 is an apocalyptic number.

It is an amenable number.

53202661 is a deficient number, since it is larger than the sum of its proper divisors (1).

53202661 is an equidigital number, since it uses as much as digits as its factorization.

53202661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 53202661 is about 7294.0154236196. The cubic root of 53202661 is about 376.1067417067.

Adding to 53202661 its reverse (16620235), we get a palindrome (69822896).

The spelling of 53202661 in words is "fifty-three million, two hundred two thousand, six hundred sixty-one".