31443141 has 16 divisors (see below), whose sum is σ = 43027200. Its totient is φ = 20415168.

The previous prime is 31443133. The next prime is 31443143. The reversal of 31443141 is 14134413.

It is not a de Polignac number, because 31443141 - 2³ = 31443133 is a prime.

It is a super-2 number, since 2×31443141² = 1977342231891762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31443143) 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, 37515 + ... + 38343.

It is an arithmetic number, because the mean of its divisors is an integer number (2689200).

Almost surely, 2^31443141 is an apocalyptic number.

It is an amenable number.

31443141 is a deficient number, since it is larger than the sum of its proper divisors (11584059).

31443141 is a wasteful number, since it uses less digits than its factorization.

31443141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148.

The product of its digits is 576, while the sum is 21.

The square root of 31443141 is about 5607.4183899545. The cubic root of 31443141 is about 315.6278432708.

Adding to 31443141 its reverse (14134413), we get a palindrome (45577554).

The spelling of 31443141 in words is "thirty-one million, four hundred forty-three thousand, one hundred forty-one".