31771142 has 16 divisors (see below), whose sum is σ = 53555040. Its totient is φ = 14025792.

The previous prime is 31771139. The next prime is 31771163. The reversal of 31771142 is 24117713.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25967 + ... + 27162.

It is an arithmetic number, because the mean of its divisors is an integer number (3347190).

Almost surely, 2^31771142 is an apocalyptic number.

31771142 is a deficient number, since it is larger than the sum of its proper divisors (21783898).

31771142 is a wasteful number, since it uses less digits than its factorization.

31771142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53167.

The product of its digits is 1176, while the sum is 26.

The square root of 31771142 is about 5636.5895717180. The cubic root of 31771142 is about 316.7215459212.

Adding to 31771142 its reverse (24117713), we get a palindrome (55888855).

It can be divided in two parts, 31771 and 142, that added together give a palindrome (31913).

The spelling of 31771142 in words is "thirty-one million, seven hundred seventy-one thousand, one hundred forty-two".