215319449 has 2 divisors, whose sum is σ = 215319450. Its totient is φ = 215319448.

The previous prime is 215319431. The next prime is 215319463. The reversal of 215319449 is 944913512.

215319449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175377049 + 39942400 = 13243^2 + 6320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215319449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (215319469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107659724 + 107659725.

It is an arithmetic number, because the mean of its divisors is an integer number (107659725).

Almost surely, 2^215319449 is an apocalyptic number.

It is an amenable number.

215319449 is a deficient number, since it is larger than the sum of its proper divisors (1).

215319449 is an equidigital number, since it uses as much as digits as its factorization.

215319449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The square root of 215319449 is about 14673.7673758309. The cubic root of 215319449 is about 599.3691972307.

The spelling of 215319449 in words is "two hundred fifteen million, three hundred nineteen thousand, four hundred forty-nine".