31361143 has 6 divisors (see below), whose sum is σ = 34471472. Its totient is φ = 28510020.

The previous prime is 31361123. The next prime is 31361171. The reversal of 31361143 is 34116313.

It is a happy number.

It is not a de Polignac number, because 31361143 - 2⁵ = 31361111 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 (31361123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 129471 + ... + 129712.

Almost surely, 2^31361143 is an apocalyptic number.

31361143 is a deficient number, since it is larger than the sum of its proper divisors (3110329).

31361143 is a wasteful number, since it uses less digits than its factorization.

31361143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259205 (or 259194 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

The square root of 31361143 is about 5600.1020526415. The cubic root of 31361143 is about 315.3532377316.

Adding to 31361143 its reverse (34116313), we get a palindrome (65477456).

The spelling of 31361143 in words is "thirty-one million, three hundred sixty-one thousand, one hundred forty-three".