31442481 has 24 divisors (see below), whose sum is σ = 52079040. Its totient is φ = 17906976.

The previous prime is 31442479. The next prime is 31442491. The reversal of 31442481 is 18424413.

It is not a de Polignac number, because 31442481 - 2¹ = 31442479 is a prime.

It is a super-2 number, since 2×31442481² = 1977259222870722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31442431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23866 + ... + 25148.

It is an arithmetic number, because the mean of its divisors is an integer number (2169960).

Almost surely, 2^31442481 is an apocalyptic number.

It is an amenable number.

31442481 is a deficient number, since it is larger than the sum of its proper divisors (20636559).

31442481 is a wasteful number, since it uses less digits than its factorization.

31442481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685 (or 1682 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 31442481 is about 5607.3595390344. The cubic root of 31442481 is about 315.6256348842.

Adding to 31442481 its reverse (18424413), we get a palindrome (49866894).

It can be divided in two parts, 3144 and 2481, that added together give a square (5625 = 75²).

The spelling of 31442481 in words is "thirty-one million, four hundred forty-two thousand, four hundred eighty-one".