231273147939 has 4 divisors (see below), whose sum is σ = 308364197256. Its totient is φ = 154182098624.

The previous prime is 231273147899. The next prime is 231273147949. The reversal of 231273147939 is 939741372132.

It is a happy number.

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 231273147939 - 2⁷ = 231273147811 is a prime.

It is a super-2 number, since 2×231273147939² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231273147891 and 231273147900.

It is not an unprimeable number, because it can be changed into a prime (231273147949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38545524654 + ... + 38545524659.

It is an arithmetic number, because the mean of its divisors is an integer number (77091049314).

Almost surely, 2^231273147939 is an apocalyptic number.

231273147939 is a deficient number, since it is larger than the sum of its proper divisors (77091049317).

231273147939 is an equidigital number, since it uses as much as digits as its factorization.

231273147939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77091049316.

The product of its digits is 1714608, while the sum is 51.

The spelling of 231273147939 in words is "two hundred thirty-one billion, two hundred seventy-three million, one hundred forty-seven thousand, nine hundred thirty-nine".