215240633 has 2 divisors, whose sum is σ = 215240634. Its totient is φ = 215240632.

The previous prime is 215240609. The next prime is 215240651. The reversal of 215240633 is 336042512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183521209 + 31719424 = 13547^2 + 5632^2 .

It is a cyclic number.

It is not a de Polignac number, because 215240633 - 2¹⁴ = 215224249 is a prime.

It is not a weakly prime, because it can be changed into another prime (215240653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107620316 + 107620317.

It is an arithmetic number, because the mean of its divisors is an integer number (107620317).

Almost surely, 2^215240633 is an apocalyptic number.

It is an amenable number.

215240633 is a deficient number, since it is larger than the sum of its proper divisors (1).

215240633 is an equidigital number, since it uses as much as digits as its factorization.

215240633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 215240633 is about 14671.0815211422. The cubic root of 215240633 is about 599.2960568371.

The spelling of 215240633 in words is "two hundred fifteen million, two hundred forty thousand, six hundred thirty-three".