31442230531 has 16 divisors (see below), whose sum is σ = 32622766848. Its totient is φ = 30272457600.

The previous prime is 31442230529. The next prime is 31442230553. The reversal of 31442230531 is 13503224413.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31442230531 - 2¹ = 31442230529 is a prime.

It is a super-2 number, since 2×31442230531² (a number of 22 digits) 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 31442230531.

It is not an unprimeable number, because it can be changed into a prime (31442233531) 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, 6001245 + ... + 6006481.

It is an arithmetic number, because the mean of its divisors is an integer number (2038922928).

Almost surely, 2^31442230531 is an apocalyptic number.

31442230531 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31442230531 is a deficient number, since it is larger than the sum of its proper divisors (1180536317).

31442230531 is a wasteful number, since it uses less digits than its factorization.

31442230531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6222.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 31442230531 its reverse (13503224413), we get a palindrome (44945454944).

The spelling of 31442230531 in words is "thirty-one billion, four hundred forty-two million, two hundred thirty thousand, five hundred thirty-one".