215134453 has 2 divisors, whose sum is σ = 215134454. Its totient is φ = 215134452.

The previous prime is 215134429. The next prime is 215134471. The reversal of 215134453 is 354431512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199317924 + 15816529 = 14118^2 + 3977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215134453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215114453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107567226 + 107567227.

It is an arithmetic number, because the mean of its divisors is an integer number (107567227).

Almost surely, 2^215134453 is an apocalyptic number.

It is an amenable number.

215134453 is a deficient number, since it is larger than the sum of its proper divisors (1).

215134453 is an equidigital number, since it uses as much as digits as its factorization.

215134453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 28.

The square root of 215134453 is about 14667.4623912932. The cubic root of 215134453 is about 599.1974947132.

Adding to 215134453 its reverse (354431512), we get a palindrome (569565965).

The spelling of 215134453 in words is "two hundred fifteen million, one hundred thirty-four thousand, four hundred fifty-three".