31431441 has 8 divisors (see below), whose sum is σ = 42001344. Its totient is φ = 20907920.

The previous prime is 31431403. The next prime is 31431443. The reversal of 31431441 is 14413413.

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 31431441 - 2¹⁰ = 31430417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31431443) 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, 9981 + ... + 12746.

It is an arithmetic number, because the mean of its divisors is an integer number (5250168).

Almost surely, 2^31431441 is an apocalyptic number.

It is an amenable number.

31431441 is a deficient number, since it is larger than the sum of its proper divisors (10569903).

31431441 is a wasteful number, since it uses less digits than its factorization.

31431441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23191.

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

The square root of 31431441 is about 5606.3750320506. The cubic root of 31431441 is about 315.5886900164.

Adding to 31431441 its reverse (14413413), we get a palindrome (45844854).

The spelling of 31431441 in words is "thirty-one million, four hundred thirty-one thousand, four hundred forty-one".