613812221 has 8 divisors (see below), whose sum is σ = 670844064. Its totient is φ = 556985520.

The previous prime is 613812211. The next prime is 613812323. The reversal of 613812221 is 122218316.

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 613812221 - 2¹⁴ = 613795837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613812211) 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, 44990 + ... + 57023.

It is an arithmetic number, because the mean of its divisors is an integer number (83855508).

Almost surely, 2^613812221 is an apocalyptic number.

It is an amenable number.

613812221 is a deficient number, since it is larger than the sum of its proper divisors (57031843).

613812221 is a wasteful number, since it uses less digits than its factorization.

613812221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102571.

The product of its digits is 1152, while the sum is 26.

The square root of 613812221 is about 24775.2340251308. The cubic root of 613812221 is about 849.8556714577.

The spelling of 613812221 in words is "six hundred thirteen million, eight hundred twelve thousand, two hundred twenty-one".