215091949 has 8 divisors (see below), whose sum is σ = 216704160. Its totient is φ = 213484656.

The previous prime is 215091931. The next prime is 215091959. The reversal of 215091949 is 949190512.

215091949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215091949 - 2¹⁵ = 215059181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215091959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147307 + ... + 148759.

It is an arithmetic number, because the mean of its divisors is an integer number (27088020).

Almost surely, 2^215091949 is an apocalyptic number.

It is an amenable number.

215091949 is a deficient number, since it is larger than the sum of its proper divisors (1612211).

215091949 is a wasteful number, since it uses less digits than its factorization.

215091949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 215091949 is about 14666.0133983302. The cubic root of 215091949 is about 599.1580310702.

The spelling of 215091949 in words is "two hundred fifteen million, ninety-one thousand, nine hundred forty-nine".