215313601 has 4 divisors (see below), whose sum is σ = 216603072. Its totient is φ = 214024132.

The previous prime is 215313587. The next prime is 215313607. The reversal of 215313601 is 106313512.

It is a happy number.

215313601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215313601 - 2⁹ = 215313089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215313607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644485 + ... + 644818.

It is an arithmetic number, because the mean of its divisors is an integer number (54150768).

Almost surely, 2^215313601 is an apocalyptic number.

It is an amenable number.

215313601 is a deficient number, since it is larger than the sum of its proper divisors (1289471).

215313601 is a wasteful number, since it uses less digits than its factorization.

215313601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289470.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 215313601 is about 14673.5681073146. The cubic root of 215313601 is about 599.3637709632.

The spelling of 215313601 in words is "two hundred fifteen million, three hundred thirteen thousand, six hundred one".