221232431039 has 4 divisors (see below), whose sum is σ = 224982133320. Its totient is φ = 217482728760.

The previous prime is 221232431033. The next prime is 221232431053. The reversal of 221232431039 is 930134232122.

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-221232431039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221232430996 and 221232431014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232431033) 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, 1874851052 + ... + 1874851169.

It is an arithmetic number, because the mean of its divisors is an integer number (56245533330).

Almost surely, 2^221232431039 is an apocalyptic number.

221232431039 is a deficient number, since it is larger than the sum of its proper divisors (3749702281).

221232431039 is an equidigital number, since it uses as much as digits as its factorization.

221232431039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3749702280.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 221232431039 in words is "two hundred twenty-one billion, two hundred thirty-two million, four hundred thirty-one thousand, thirty-nine".