215130651 has 4 divisors (see below), whose sum is σ = 286840872. Its totient is φ = 143420432.

The previous prime is 215130647. The next prime is 215130653. The reversal of 215130651 is 156031512.

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 215130651 - 2² = 215130647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215130653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35855106 + ... + 35855111.

It is an arithmetic number, because the mean of its divisors is an integer number (71710218).

Almost surely, 2^215130651 is an apocalyptic number.

215130651 is a deficient number, since it is larger than the sum of its proper divisors (71710221).

215130651 is an equidigital number, since it uses as much as digits as its factorization.

215130651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71710220.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 215130651 is about 14667.3327841159. The cubic root of 215130651 is about 599.1939648861.

The spelling of 215130651 in words is "two hundred fifteen million, one hundred thirty thousand, six hundred fifty-one".