215260601 has 2 divisors, whose sum is σ = 215260602. Its totient is φ = 215260600.

The previous prime is 215260553. The next prime is 215260603. The reversal of 215260601 is 106062512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127351225 + 87909376 = 11285^2 + 9376^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215260601 is a prime.

Together with 215260603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (215260603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107630300 + 107630301.

It is an arithmetic number, because the mean of its divisors is an integer number (107630301).

Almost surely, 2^215260601 is an apocalyptic number.

It is an amenable number.

215260601 is a deficient number, since it is larger than the sum of its proper divisors (1).

215260601 is an equidigital number, since it uses as much as digits as its factorization.

215260601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 215260601 is about 14671.7620277866. The cubic root of 215260601 is about 599.3145886132.

The spelling of 215260601 in words is "two hundred fifteen million, two hundred sixty thousand, six hundred one".