1442221531 has 8 divisors (see below), whose sum is σ = 1470427344. Its totient is φ = 1414052640.

The previous prime is 1442221523. The next prime is 1442221559. The reversal of 1442221531 is 1351222441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1442221531 - 2³ = 1442221523 is a prime.

It is a super-2 number, since 2×1442221531² = 4160005888959967922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1442221496 and 1442221505.

It is not an unprimeable number, because it can be changed into a prime (1442225531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77520 + ... + 94306.

It is an arithmetic number, because the mean of its divisors is an integer number (183803418).

Almost surely, 2^1442221531 is an apocalyptic number.

1442221531 is a deficient number, since it is larger than the sum of its proper divisors (28205813).

1442221531 is a wasteful number, since it uses less digits than its factorization.

1442221531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18461.

The product of its digits is 1920, while the sum is 25.

The square root of 1442221531 is about 37976.5918823688. The cubic root of 1442221531 is about 1129.8236420417.

Adding to 1442221531 its reverse (1351222441), we get a palindrome (2793443972).

It can be divided in two parts, 14422 and 21531, that added together give a palindrome (35953).

The spelling of 1442221531 in words is "one billion, four hundred forty-two million, two hundred twenty-one thousand, five hundred thirty-one".