215681147 has 8 divisors (see below), whose sum is σ = 235395072. Its totient is φ = 195985000.

The previous prime is 215681119. The next prime is 215681153. The reversal of 215681147 is 741186512.

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 215681147 - 2¹⁰ = 215680123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215681117) 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, 43022 + ... + 47772.

It is an arithmetic number, because the mean of its divisors is an integer number (29424384).

Almost surely, 2^215681147 is an apocalyptic number.

215681147 is a deficient number, since it is larger than the sum of its proper divisors (19713925).

215681147 is a wasteful number, since it uses less digits than its factorization.

215681147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8889.

The product of its digits is 13440, while the sum is 35.

The square root of 215681147 is about 14686.0868511663. The cubic root of 215681147 is about 599.7046203494.

The spelling of 215681147 in words is "two hundred fifteen million, six hundred eighty-one thousand, one hundred forty-seven".