307396221 has 8 divisors (see below), whose sum is σ = 447121824. Its totient is φ = 186300720.

The previous prime is 307396153. The next prime is 307396247. The reversal of 307396221 is 122693703.

It is a happy number.

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

It is not a de Polignac number, because 307396221 - 2⁹ = 307395709 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 9315037 = 307396221 / (3 + 0 + 7 + 3 + 9 + 6 + 2 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307396291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4657486 + ... + 4657551.

It is an arithmetic number, because the mean of its divisors is an integer number (55890228).

Almost surely, 2^307396221 is an apocalyptic number.

It is an amenable number.

307396221 is a deficient number, since it is larger than the sum of its proper divisors (139725603).

307396221 is a wasteful number, since it uses less digits than its factorization.

307396221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9315051.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 307396221 is about 17532.7185855474. The cubic root of 307396221 is about 674.8897641655.

The spelling of 307396221 in words is "three hundred seven million, three hundred ninety-six thousand, two hundred twenty-one".