215312151 has 8 divisors (see below), whose sum is σ = 288571120. Its totient is φ = 142797312.

The previous prime is 215312087. The next prime is 215312159. The reversal of 215312151 is 151213512.

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

It is not a de Polignac number, because 215312151 - 2⁶ = 215312087 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 (215312159) 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, 185356 + ... + 186513.

It is an arithmetic number, because the mean of its divisors is an integer number (36071390).

Almost surely, 2^215312151 is an apocalyptic number.

215312151 is a deficient number, since it is larger than the sum of its proper divisors (73258969).

215312151 is a wasteful number, since it uses less digits than its factorization.

215312151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372065.

The product of its digits is 300, while the sum is 21.

The square root of 215312151 is about 14673.5186986626. The cubic root of 215312151 is about 599.3624255157.

Adding to 215312151 its reverse (151213512), we get a palindrome (366525663).

The spelling of 215312151 in words is "two hundred fifteen million, three hundred twelve thousand, one hundred fifty-one".