215413651 has 2 divisors, whose sum is σ = 215413652. Its totient is φ = 215413650.

The previous prime is 215413609. The next prime is 215413663. The reversal of 215413651 is 156314512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215413651 - 2²³ = 207025043 is a prime.

It is not a weakly prime, because it can be changed into another prime (215413351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107706825 + 107706826.

It is an arithmetic number, because the mean of its divisors is an integer number (107706826).

Almost surely, 2^215413651 is an apocalyptic number.

215413651 is a deficient number, since it is larger than the sum of its proper divisors (1).

215413651 is an equidigital number, since it uses as much as digits as its factorization.

215413651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 215413651 is about 14676.9769026186. The cubic root of 215413651 is about 599.4565922545.

The spelling of 215413651 in words is "two hundred fifteen million, four hundred thirteen thousand, six hundred fifty-one".