142021254531 has 64 divisors (see below), whose sum is σ = 223584883200. Its totient is φ = 79343609856.

The previous prime is 142021254527. The next prime is 142021254559. The reversal of 142021254531 is 135452120241.

It is not a de Polignac number, because 142021254531 - 2² = 142021254527 is a prime.

It is a super-2 number, since 2×142021254531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142021250531) 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 63 ways as a sum of consecutive naturals, for example, 24203860 + ... + 24209726.

It is an arithmetic number, because the mean of its divisors is an integer number (3493513800).

Almost surely, 2^142021254531 is an apocalyptic number.

142021254531 is a deficient number, since it is larger than the sum of its proper divisors (81563628669).

142021254531 is a wasteful number, since it uses less digits than its factorization.

142021254531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7188.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 142021254531 its reverse (135452120241), we get a palindrome (277473374772).

The spelling of 142021254531 in words is "one hundred forty-two billion, twenty-one million, two hundred fifty-four thousand, five hundred thirty-one".