31143941 has 8 divisors (see below), whose sum is σ = 32342520. Its totient is φ = 29953728.

The previous prime is 31143929. The next prime is 31143947. The reversal of 31143941 is 14934113.

It can be written as a sum of positive squares in 4 ways, for example, as 297025 + 30846916 = 545^2 + 5554^2 .

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 31143941 - 2⁶ = 31143877 is a prime.

It is a super-2 number, since 2×31143941² = 1939890122022962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31143941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143947) 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, 6095 + ... + 9971.

It is an arithmetic number, because the mean of its divisors is an integer number (4042815).

Almost surely, 2^31143941 is an apocalyptic number.

It is an amenable number.

31143941 is a deficient number, since it is larger than the sum of its proper divisors (1198579).

31143941 is a wasteful number, since it uses less digits than its factorization.

31143941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4183.

The product of its digits is 1296, while the sum is 26.

The square root of 31143941 is about 5580.6756759375. The cubic root of 31143941 is about 314.6235226795.

The spelling of 31143941 in words is "thirty-one million, one hundred forty-three thousand, nine hundred forty-one".