215414651 has 2 divisors, whose sum is σ = 215414652. Its totient is φ = 215414650.

The previous prime is 215414611. The next prime is 215414657. The reversal of 215414651 is 156414512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215414651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (215414657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107707325 + 107707326.

It is an arithmetic number, because the mean of its divisors is an integer number (107707326).

Almost surely, 2^215414651 is an apocalyptic number.

215414651 is a deficient number, since it is larger than the sum of its proper divisors (1).

215414651 is an equidigital number, since it uses as much as digits as its factorization.

215414651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 29.

The square root of 215414651 is about 14677.0109695401. The cubic root of 215414651 is about 599.4575198585.

The spelling of 215414651 in words is "two hundred fifteen million, four hundred fourteen thousand, six hundred fifty-one".