613105221 has 8 divisors (see below), whose sum is σ = 865560384. Its totient is φ = 384693440.

The previous prime is 613105201. The next prime is 613105291. The reversal of 613105221 is 122501316.

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 613105221 - 2¹³ = 613097029 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613105201) 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, 6010785 + ... + 6010886.

It is an arithmetic number, because the mean of its divisors is an integer number (108195048).

Almost surely, 2^613105221 is an apocalyptic number.

It is an amenable number.

613105221 is a deficient number, since it is larger than the sum of its proper divisors (252455163).

613105221 is a wasteful number, since it uses less digits than its factorization.

613105221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12021691.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 613105221 is about 24760.9616331838. The cubic root of 613105221 is about 849.5292530646.

Adding to 613105221 its reverse (122501316), we get a palindrome (735606537).

The spelling of 613105221 in words is "six hundred thirteen million, one hundred five thousand, two hundred twenty-one".