31842111 has 24 divisors (see below), whose sum is σ = 49641984. Its totient is φ = 18102000.

The previous prime is 31842103. The next prime is 31842127. The reversal of 31842111 is 11124813.

It is a happy number.

It is not a de Polignac number, because 31842111 - 2³ = 31842103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31842101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36466 + ... + 37328.

It is an arithmetic number, because the mean of its divisors is an integer number (2068416).

Almost surely, 2^31842111 is an apocalyptic number.

31842111 is a deficient number, since it is larger than the sum of its proper divisors (17799873).

31842111 is a wasteful number, since it uses less digits than its factorization.

31842111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131 (or 1124 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

The square root of 31842111 is about 5642.8814447940. The cubic root of 31842111 is about 316.9571968333.

Adding to 31842111 its reverse (11124813), we get a palindrome (42966924).

The spelling of 31842111 in words is "thirty-one million, eight hundred forty-two thousand, one hundred eleven".