221265013 has 8 divisors (see below), whose sum is σ = 246611520. Its totient is φ = 197288640.

The previous prime is 221265007. The next prime is 221265019. The reversal of 221265013 is 310562122.

221265013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221265007) and next prime (221265019).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221265013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221265019) 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, 342193 + ... + 342838.

It is an arithmetic number, because the mean of its divisors is an integer number (30826440).

Almost surely, 2^221265013 is an apocalyptic number.

It is an amenable number.

221265013 is a deficient number, since it is larger than the sum of its proper divisors (25346507).

221265013 is a wasteful number, since it uses less digits than its factorization.

221265013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685067.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 221265013 is about 14874.9794285572. The cubic root of 221265013 is about 604.8359302841.

The spelling of 221265013 in words is "two hundred twenty-one million, two hundred sixty-five thousand, thirteen".