142224311 has 4 divisors (see below), whose sum is σ = 146812224. Its totient is φ = 137636400.

The previous prime is 142224307. The next prime is 142224319. The reversal of 142224311 is 113422241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142224311 - 2² = 142224307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142224319) 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, 2293910 + ... + 2293971.

It is an arithmetic number, because the mean of its divisors is an integer number (36703056).

Almost surely, 2^142224311 is an apocalyptic number.

142224311 is a deficient number, since it is larger than the sum of its proper divisors (4587913).

142224311 is an equidigital number, since it uses as much as digits as its factorization.

142224311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587912.

The product of its digits is 384, while the sum is 20.

The square root of 142224311 is about 11925.7834543480. The cubic root of 142224311 is about 521.9849075460.

Adding to 142224311 its reverse (113422241), we get a palindrome (255646552).

The spelling of 142224311 in words is "one hundred forty-two million, two hundred twenty-four thousand, three hundred eleven".