215042651 has 2 divisors, whose sum is σ = 215042652. Its totient is φ = 215042650.

The previous prime is 215042621. The next prime is 215042687. The reversal of 215042651 is 156240512.

215042651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215042651 - 2¹⁸ = 214780507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215042651.

It is not a weakly prime, because it can be changed into another prime (215042621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107521325 + 107521326.

It is an arithmetic number, because the mean of its divisors is an integer number (107521326).

Almost surely, 2^215042651 is an apocalyptic number.

215042651 is a deficient number, since it is larger than the sum of its proper divisors (1).

215042651 is an equidigital number, since it uses as much as digits as its factorization.

215042651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 215042651 is about 14664.3326135218. The cubic root of 215042651 is about 599.1122528970.

The spelling of 215042651 in words is "two hundred fifteen million, forty-two thousand, six hundred fifty-one".