231229921039 has 4 divisors (see below), whose sum is σ = 249016838056. Its totient is φ = 213443004024.

The previous prime is 231229920947. The next prime is 231229921061. The reversal of 231229921039 is 930129922132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231229921039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231229920986 and 231229921004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231229927039) 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, 8893458489 + ... + 8893458514.

It is an arithmetic number, because the mean of its divisors is an integer number (62254209514).

Almost surely, 2^231229921039 is an apocalyptic number.

231229921039 is a deficient number, since it is larger than the sum of its proper divisors (17786917017).

231229921039 is a wasteful number, since it uses less digits than its factorization.

231229921039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17786917016.

The product of its (nonzero) digits is 104976, while the sum is 43.

The spelling of 231229921039 in words is "two hundred thirty-one billion, two hundred twenty-nine million, nine hundred twenty-one thousand, thirty-nine".