31142111 has 32 divisors (see below), whose sum is σ = 42674688. Its totient is φ = 21939840.

The previous prime is 31142101. The next prime is 31142117. The reversal of 31142111 is 11124113.

It is not a de Polignac number, because 31142111 - 2¹⁴ = 31125727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31142117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52760 + ... + 53346.

It is an arithmetic number, because the mean of its divisors is an integer number (1333584).

Almost surely, 2^31142111 is an apocalyptic number.

31142111 is a deficient number, since it is larger than the sum of its proper divisors (11532577).

31142111 is a wasteful number, since it uses less digits than its factorization.

31142111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671.

The product of its digits is 24, while the sum is 14.

The square root of 31142111 is about 5580.5117148878. The cubic root of 31142111 is about 314.6173601933.

Adding to 31142111 its reverse (11124113), we get a palindrome (42266224).

It can be divided in two parts, 3114 and 2111, that added together give a palindrome (5225).

The spelling of 31142111 in words is "thirty-one million, one hundred forty-two thousand, one hundred eleven".