142223131 has 4 divisors (see below), whose sum is σ = 142677832. Its totient is φ = 141768432.

The previous prime is 142223093. The next prime is 142223141. The reversal of 142223131 is 131322241.

It is a happy number.

142223131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131322241 = 191 ⋅687551.

It is a cyclic number.

It is not a de Polignac number, because 142223131 - 2²⁵ = 108668699 is a prime.

It is a super-2 number, since 2×142223131² = 40454837982886322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142223099 and 142223108.

It is not an unprimeable number, because it can be changed into a prime (142223141) 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, 226881 + ... + 227506.

It is an arithmetic number, because the mean of its divisors is an integer number (35669458).

Almost surely, 2^142223131 is an apocalyptic number.

142223131 is a deficient number, since it is larger than the sum of its proper divisors (454701).

142223131 is an equidigital number, since it uses as much as digits as its factorization.

142223131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454700.

The product of its digits is 288, while the sum is 19.

The square root of 142223131 is about 11925.7339816047. The cubic root of 142223131 is about 521.9834639487.

Adding to 142223131 its reverse (131322241), we get a palindrome (273545372).

The spelling of 142223131 in words is "one hundred forty-two million, two hundred twenty-three thousand, one hundred thirty-one".