31142141 has 4 divisors (see below), whose sum is σ = 31463292. Its totient is φ = 30820992.

The previous prime is 31142129. The next prime is 31142179. The reversal of 31142141 is 14124113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14707225 + 16434916 = 3835^2 + 4054^2 .

It is a cyclic number.

It is not a de Polignac number, because 31142141 - 2⁶ = 31142077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31142101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160430 + ... + 160623.

It is an arithmetic number, because the mean of its divisors is an integer number (7865823).

Almost surely, 2^31142141 is an apocalyptic number.

It is an amenable number.

31142141 is a deficient number, since it is larger than the sum of its proper divisors (321151).

31142141 is an equidigital number, since it uses as much as digits as its factorization.

31142141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321150.

The product of its digits is 96, while the sum is 17.

The square root of 31142141 is about 5580.5144028127. The cubic root of 31142141 is about 314.6174612196.

Adding to 31142141 its reverse (14124113), we get a palindrome (45266254).

The spelling of 31142141 in words is "thirty-one million, one hundred forty-two thousand, one hundred forty-one".