215745013 has 8 divisors (see below), whose sum is σ = 236720736. Its totient is φ = 194996400.

The previous prime is 215745001. The next prime is 215745017. The reversal of 215745013 is 310547512.

It is a happy number.

215745013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215745013 - 2¹³ = 215736821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215745017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54783 + ... + 58588.

It is an arithmetic number, because the mean of its divisors is an integer number (29590092).

Almost surely, 2^215745013 is an apocalyptic number.

It is an amenable number.

215745013 is a deficient number, since it is larger than the sum of its proper divisors (20975723).

215745013 is a wasteful number, since it uses less digits than its factorization.

215745013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113555.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 215745013 is about 14688.2610611331. The cubic root of 215745013 is about 599.7638079603.

The spelling of 215745013 in words is "two hundred fifteen million, seven hundred forty-five thousand, thirteen".