309222613 has 8 divisors (see below), whose sum is σ = 364797440. Its totient is φ = 256497840.

The previous prime is 309222601. The next prime is 309222623. The reversal of 309222613 is 316222903.

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 309222613 - 2²¹ = 307125461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309222623) 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, 712278 + ... + 712711.

It is an arithmetic number, because the mean of its divisors is an integer number (45599680).

Almost surely, 2^309222613 is an apocalyptic number.

It is an amenable number.

309222613 is a deficient number, since it is larger than the sum of its proper divisors (55574827).

309222613 is a wasteful number, since it uses less digits than its factorization.

309222613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425027.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 309222613 is about 17584.7266967673. The cubic root of 309222613 is about 676.2237429429.

The spelling of 309222613 in words is "three hundred nine million, two hundred twenty-two thousand, six hundred thirteen".