215274497 has 2 divisors, whose sum is σ = 215274498. Its totient is φ = 215274496.

The previous prime is 215274481. The next prime is 215274557. The reversal of 215274497 is 794472512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124567921 + 90706576 = 11161^2 + 9524^2 .

It is a cyclic number.

It is not a de Polignac number, because 215274497 - 2⁴ = 215274481 is a prime.

It is not a weakly prime, because it can be changed into another prime (215274407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107637248 + 107637249.

It is an arithmetic number, because the mean of its divisors is an integer number (107637249).

Almost surely, 2^215274497 is an apocalyptic number.

It is an amenable number.

215274497 is a deficient number, since it is larger than the sum of its proper divisors (1).

215274497 is an equidigital number, since it uses as much as digits as its factorization.

215274497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 41.

The square root of 215274497 is about 14672.2355828960. The cubic root of 215274497 is about 599.3274844493.

The spelling of 215274497 in words is "two hundred fifteen million, two hundred seventy-four thousand, four hundred ninety-seven".