309328406227131 has 4 divisors (see below), whose sum is σ = 412437874969512. Its totient is φ = 206218937484752.

The previous prime is 309328406227103. The next prime is 309328406227231. The reversal of 309328406227131 is 131722604823903.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 309328406227131 - 2⁶ = 309328406227067 is a prime.

It is a super-2 number, since 2×309328406227131² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (309328406227231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51554734371186 + ... + 51554734371191.

It is an arithmetic number, because the mean of its divisors is an integer number (103109468742378).

Almost surely, 2^{309328406227131} is an apocalyptic number.

309328406227131 is a deficient number, since it is larger than the sum of its proper divisors (103109468742381).

309328406227131 is a wasteful number, since it uses less digits than its factorization.

309328406227131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103109468742380.

The product of its (nonzero) digits is 2612736, while the sum is 51.

The spelling of 309328406227131 in words is "three hundred nine trillion, three hundred twenty-eight billion, four hundred six million, two hundred twenty-seven thousand, one hundred thirty-one".