215500151 has 4 divisors (see below), whose sum is σ = 215540400. Its totient is φ = 215459904.

The previous prime is 215500139. The next prime is 215500157. The reversal of 215500151 is 151005512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 215500151 - 2¹⁰ = 215499127 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 (215500157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10586 + ... + 23303.

It is an arithmetic number, because the mean of its divisors is an integer number (53885100).

Almost surely, 2^215500151 is an apocalyptic number.

215500151 is a deficient number, since it is larger than the sum of its proper divisors (40249).

215500151 is an equidigital number, since it uses as much as digits as its factorization.

215500151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40248.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 215500151 is about 14679.9233989827. The cubic root of 215500151 is about 599.5368193834.

Adding to 215500151 its reverse (151005512), we get a palindrome (366505663).

The spelling of 215500151 in words is "two hundred fifteen million, five hundred thousand, one hundred fifty-one".