309341431 has 8 divisors (see below), whose sum is σ = 359329184. Its totient is φ = 260802720.

The previous prime is 309341419. The next prime is 309341449. The reversal of 309341431 is 134143903.

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 309341431 - 2¹³ = 309333239 is a prime.

It is a super-2 number, since 2×309341431² = 191384241866255522, which contains 22 as substring.

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 309341431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309341471) 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, 361800 + ... + 362653.

It is an arithmetic number, because the mean of its divisors is an integer number (44916148).

Almost surely, 2^309341431 is an apocalyptic number.

309341431 is a deficient number, since it is larger than the sum of its proper divisors (49987753).

309341431 is an equidigital number, since it uses as much as digits as its factorization.

309341431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724521.

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

The square root of 309341431 is about 17588.1048154712. The cubic root of 309341431 is about 676.3103442677.

The spelling of 309341431 in words is "three hundred nine million, three hundred forty-one thousand, four hundred thirty-one".