142225331 has 2 divisors, whose sum is σ = 142225332. Its totient is φ = 142225330.

The previous prime is 142225327. The next prime is 142225333. The reversal of 142225331 is 133522241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142225331 - 2² = 142225327 is a prime.

It is a super-2 number, since 2×142225331² = 40456089556119122, which contains 22 as substring.

Together with 142225333, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_8030732 and since 142225331 and 8030732 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 142225297 and 142225306.

It is not a weakly prime, because it can be changed into another prime (142225333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71112665 + 71112666.

It is an arithmetic number, because the mean of its divisors is an integer number (71112666).

Almost surely, 2^142225331 is an apocalyptic number.

142225331 is a deficient number, since it is larger than the sum of its proper divisors (1).

142225331 is an equidigital number, since it uses as much as digits as its factorization.

142225331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 142225331 is about 11925.8262187573. The cubic root of 142225331 is about 521.9861553949.

Adding to 142225331 its reverse (133522241), we get a palindrome (275747572).

The spelling of 142225331 in words is "one hundred forty-two million, two hundred twenty-five thousand, three hundred thirty-one".