31311141 has 4 divisors (see below), whose sum is σ = 41748192. Its totient is φ = 20874092.

The previous prime is 31311131. The next prime is 31311143. The reversal of 31311141 is 14111313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31311141 - 2⁵ = 31311109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31311141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311143) 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, 5218521 + ... + 5218526.

It is an arithmetic number, because the mean of its divisors is an integer number (10437048).

Almost surely, 2^31311141 is an apocalyptic number.

It is an amenable number.

31311141 is a deficient number, since it is larger than the sum of its proper divisors (10437051).

31311141 is a wasteful number, since it uses less digits than its factorization.

31311141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10437050.

The product of its digits is 36, while the sum is 15.

The square root of 31311141 is about 5595.6358887976. The cubic root of 31311141 is about 315.1855495374.

Adding to 31311141 its reverse (14111313), we get a palindrome (45422454).

The spelling of 31311141 in words is "thirty-one million, three hundred eleven thousand, one hundred forty-one".