142227531 has 24 divisors (see below), whose sum is σ = 211273920. Its totient is φ = 92148336.

The previous prime is 142227523. The next prime is 142227541. The reversal of 142227531 is 135722241.

It is not a de Polignac number, because 142227531 - 2³ = 142227523 is a prime.

It is a super-2 number, since 2×142227531² = 40457341148711922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142227495 and 142227504.

It is not an unprimeable number, because it can be changed into a prime (142227541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87040 + ... + 88658.

It is an arithmetic number, because the mean of its divisors is an integer number (8803080).

Almost surely, 2^142227531 is an apocalyptic number.

142227531 is a deficient number, since it is larger than the sum of its proper divisors (69046389).

142227531 is a wasteful number, since it uses less digits than its factorization.

142227531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895 (or 1892 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 142227531 is about 11925.9184551966. The cubic root of 142227531 is about 521.9888468133.

Adding to 142227531 its reverse (135722241), we get a palindrome (277949772).

The spelling of 142227531 in words is "one hundred forty-two million, two hundred twenty-seven thousand, five hundred thirty-one".