215552453 has 2 divisors, whose sum is σ = 215552454. Its totient is φ = 215552452.

The previous prime is 215552419. The next prime is 215552459. The reversal of 215552453 is 354255512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170903329 + 44649124 = 13073^2 + 6682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215552453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215552459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107776226 + 107776227.

It is an arithmetic number, because the mean of its divisors is an integer number (107776227).

Almost surely, 2^215552453 is an apocalyptic number.

It is an amenable number.

215552453 is a deficient number, since it is larger than the sum of its proper divisors (1).

215552453 is an equidigital number, since it uses as much as digits as its factorization.

215552453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30000, while the sum is 32.

The square root of 215552453 is about 14681.7047034736. The cubic root of 215552453 is about 599.5853180939.

The spelling of 215552453 in words is "two hundred fifteen million, five hundred fifty-two thousand, four hundred fifty-three".