613373221 has 4 divisors (see below), whose sum is σ = 614992000. Its totient is φ = 611754444.

The previous prime is 613373213. The next prime is 613373227. The reversal of 613373221 is 122373316.

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 613373221 - 2³ = 613373213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 613373221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613373227) 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, 808821 + ... + 809578.

It is an arithmetic number, because the mean of its divisors is an integer number (153748000).

Almost surely, 2^613373221 is an apocalyptic number.

It is an amenable number.

613373221 is a deficient number, since it is larger than the sum of its proper divisors (1618779).

613373221 is a wasteful number, since it uses less digits than its factorization.

613373221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618778.

The product of its digits is 4536, while the sum is 28.

The square root of 613373221 is about 24766.3727865023. The cubic root of 613373221 is about 849.6530168529.

It can be divided in two parts, 6133732 and 21, that added together give a triangular number (6133753 = T₃₅₀₂).

The spelling of 613373221 in words is "six hundred thirteen million, three hundred seventy-three thousand, two hundred twenty-one".