231306381442 has 8 divisors (see below), whose sum is σ = 346963681296. Its totient is φ = 115651821012.

The previous prime is 231306381389. The next prime is 231306381469. The reversal of 231306381442 is 244183603132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458848 + ... + 820459.

It is an arithmetic number, because the mean of its divisors is an integer number (43370460162).

Almost surely, 2^231306381442 is an apocalyptic number.

231306381442 is a deficient number, since it is larger than the sum of its proper divisors (115657299854).

231306381442 is a wasteful number, since it uses less digits than its factorization.

231306381442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369712.

The product of its (nonzero) digits is 82944, while the sum is 37.

Adding to 231306381442 its reverse (244183603132), we get a palindrome (475489984574).

The spelling of 231306381442 in words is "two hundred thirty-one billion, three hundred six million, three hundred eighty-one thousand, four hundred forty-two".