142422231 has 16 divisors (see below), whose sum is σ = 217401344. Its totient is φ = 81242784.

The previous prime is 142422223. The next prime is 142422239. The reversal of 142422231 is 132224241.

It is an interprime number because it is at equal distance from previous prime (142422223) and next prime (142422239).

It is not a de Polignac number, because 142422231 - 2³ = 142422223 is a prime.

It is a super-2 number, since 2×142422231² = 40568183766034722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142422198 and 142422207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142422239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7161 + ... + 18333.

It is an arithmetic number, because the mean of its divisors is an integer number (13587584).

Almost surely, 2^142422231 is an apocalyptic number.

142422231 is a deficient number, since it is larger than the sum of its proper divisors (74979113).

142422231 is a wasteful number, since it uses less digits than its factorization.

142422231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11790.

The product of its digits is 768, while the sum is 21.

The square root of 142422231 is about 11934.0785568053. The cubic root of 142422231 is about 522.2269275082.

Adding to 142422231 its reverse (132224241), we get a palindrome (274646472).

The spelling of 142422231 in words is "one hundred forty-two million, four hundred twenty-two thousand, two hundred thirty-one".