444142531 has 16 divisors (see below), whose sum is σ = 519171840. Its totient is φ = 372097440.

The previous prime is 444142529. The next prime is 444142547. The reversal of 444142531 is 135241444.

It is a cyclic number.

It is not a de Polignac number, because 444142531 - 2¹ = 444142529 is a prime.

It is a super-2 number, since 2×444142531² = 394525175686171922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 444142531.

It is not an unprimeable number, because it can be changed into a prime (444145531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57825 + ... + 65053.

It is an arithmetic number, because the mean of its divisors is an integer number (32448240).

Almost surely, 2^444142531 is an apocalyptic number.

444142531 is a deficient number, since it is larger than the sum of its proper divisors (75029309).

444142531 is a wasteful number, since it uses less digits than its factorization.

444142531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7434.

The product of its digits is 7680, while the sum is 28.

The square root of 444142531 is about 21074.6893452786. The cubic root of 444142531 is about 762.9699869157.

Adding to 444142531 its reverse (135241444), we get a palindrome (579383975).

The spelling of 444142531 in words is "four hundred forty-four million, one hundred forty-two thousand, five hundred thirty-one".