215087701 has 2 divisors, whose sum is σ = 215087702. Its totient is φ = 215087700.

The previous prime is 215087699. The next prime is 215087707. The reversal of 215087701 is 107780512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119028100 + 96059601 = 10910^2 + 9801^2 .

It is a cyclic number.

It is not a de Polignac number, because 215087701 - 2¹ = 215087699 is a prime.

Together with 215087699, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215087707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107543850 + 107543851.

It is an arithmetic number, because the mean of its divisors is an integer number (107543851).

Almost surely, 2^215087701 is an apocalyptic number.

It is an amenable number.

215087701 is a deficient number, since it is larger than the sum of its proper divisors (1).

215087701 is an equidigital number, since it uses as much as digits as its factorization.

215087701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 215087701 is about 14665.8685729826. The cubic root of 215087701 is about 599.1540866485.

The spelling of 215087701 in words is "two hundred fifteen million, eighty-seven thousand, seven hundred one".