142256441531 has 4 divisors (see below), whose sum is σ = 142846717464. Its totient is φ = 141666165600.

The previous prime is 142256441513. The next prime is 142256441599. The reversal of 142256441531 is 135144652241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135144652241 = 31 ⋅4359504911.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142256441531 is a prime.

It is a super-2 number, since 2×142256441531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142256441231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295137605 + ... + 295138086.

It is an arithmetic number, because the mean of its divisors is an integer number (35711679366).

Almost surely, 2^142256441531 is an apocalyptic number.

142256441531 is a deficient number, since it is larger than the sum of its proper divisors (590275933).

142256441531 is an equidigital number, since it uses as much as digits as its factorization.

142256441531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590275932.

The product of its digits is 115200, while the sum is 38.

The spelling of 142256441531 in words is "one hundred forty-two billion, two hundred fifty-six million, four hundred forty-one thousand, five hundred thirty-one".