309212014 has 16 divisors (see below), whose sum is σ = 494693568. Its totient is φ = 144447232.

The previous prime is 309212009. The next prime is 309212021. The reversal of 309212014 is 410212903.

It is a super-2 number, since 2×309212014² = 191224139203872392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28534 + ... + 37849.

It is an arithmetic number, because the mean of its divisors is an integer number (30918348).

Almost surely, 2^309212014 is an apocalyptic number.

309212014 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

309212014 is a deficient number, since it is larger than the sum of its proper divisors (185481554).

309212014 is a wasteful number, since it uses less digits than its factorization.

309212014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66539.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 309212014 is about 17584.4253247014. The cubic root of 309212014 is about 676.2160167105.

Adding to 309212014 its reverse (410212903), we get a palindrome (719424917).

The spelling of 309212014 in words is "three hundred nine million, two hundred twelve thousand, fourteen".