215065249 has 16 divisors (see below), whose sum is σ = 271565568. Its totient is φ = 165952512.

The previous prime is 215065241. The next prime is 215065261. The reversal of 215065249 is 942560512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 215065249 - 2³ = 215065241 is a prime.

It is a super-2 number, since 2×215065249² = 92506122654864002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215065241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36552 + ... + 42025.

It is an arithmetic number, because the mean of its divisors is an integer number (16972848).

Almost surely, 2^215065249 is an apocalyptic number.

It is an amenable number.

215065249 is a deficient number, since it is larger than the sum of its proper divisors (56500319).

215065249 is a wasteful number, since it uses less digits than its factorization.

215065249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78624.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 215065249 is about 14665.1031022629. The cubic root of 215065249 is about 599.1332382913.

The spelling of 215065249 in words is "two hundred fifteen million, sixty-five thousand, two hundred forty-nine".