231442222 has 8 divisors (see below), whose sum is σ = 378723672. Its totient is φ = 105201000.

The previous prime is 231442217. The next prime is 231442223. The reversal of 231442222 is 222244132.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 10520101 = 231442222 / (2 + 3 + 1 + 4 + 4 + 2 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 231442193 and 231442202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231442223) 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, 5260029 + ... + 5260072.

It is an arithmetic number, because the mean of its divisors is an integer number (47340459).

Almost surely, 2^231442222 is an apocalyptic number.

231442222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231442222 is a deficient number, since it is larger than the sum of its proper divisors (147281450).

231442222 is a wasteful number, since it uses less digits than its factorization.

231442222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10520114.

The product of its digits is 1536, while the sum is 22.

The square root of 231442222 is about 15213.2252333291. The cubic root of 231442222 is about 613.9705358509.

Adding to 231442222 its reverse (222244132), we get a palindrome (453686354).

The spelling of 231442222 in words is "two hundred thirty-one million, four hundred forty-two thousand, two hundred twenty-two".