215172049 has 2 divisors, whose sum is σ = 215172050. Its totient is φ = 215172048.

The previous prime is 215172011. The next prime is 215172053. The reversal of 215172049 is 940271512.

215172049 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., 213890625 + 1281424 = 14625^2 + 1132^2 .

It is a cyclic number.

It is not a de Polignac number, because 215172049 - 2⁷ = 215171921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215172049.

It is not a weakly prime, because it can be changed into another prime (215172449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107586024 + 107586025.

It is an arithmetic number, because the mean of its divisors is an integer number (107586025).

Almost surely, 2^215172049 is an apocalyptic number.

It is an amenable number.

215172049 is a deficient number, since it is larger than the sum of its proper divisors (1).

215172049 is an equidigital number, since it uses as much as digits as its factorization.

215172049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 215172049 is about 14668.7439475914. The cubic root of 215172049 is about 599.2323970988.

The spelling of 215172049 in words is "two hundred fifteen million, one hundred seventy-two thousand, forty-nine".