142442113631 has 4 divisors (see below), whose sum is σ = 149939067000. Its totient is φ = 134945160264.

The previous prime is 142442113607. The next prime is 142442113721. The reversal of 142442113631 is 136311244241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136311244241 = 31 ⋅4397136911.

It is not a de Polignac number, because 142442113631 - 2³⁴ = 125262244447 is a prime.

It is a super-2 number, since 2×142442113631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142442113031) 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, 3748476656 + ... + 3748476693.

It is an arithmetic number, because the mean of its divisors is an integer number (37484766750).

Almost surely, 2^142442113631 is an apocalyptic number.

142442113631 is a deficient number, since it is larger than the sum of its proper divisors (7496953369).

142442113631 is an equidigital number, since it uses as much as digits as its factorization.

142442113631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7496953368.

The product of its digits is 13824, while the sum is 32.

Adding to 142442113631 its reverse (136311244241), we get a palindrome (278753357872).

The spelling of 142442113631 in words is "one hundred forty-two billion, four hundred forty-two million, one hundred thirteen thousand, six hundred thirty-one".