31243134 has 32 divisors (see below), whose sum is σ = 67695264. Its totient is φ = 9555840.

The previous prime is 31243123. The next prime is 31243139. The reversal of 31243134 is 43134213.

It is a super-2 number, since 2×31243134² = 1952266844283912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31243134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31243139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13012 + ... + 15224.

It is an arithmetic number, because the mean of its divisors is an integer number (2115477).

Almost surely, 2^31243134 is an apocalyptic number.

31243134 is an abundant number, since it is smaller than the sum of its proper divisors (36452130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31243134 is a wasteful number, since it uses less digits than its factorization.

31243134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412.

The product of its digits is 864, while the sum is 21.

The square root of 31243134 is about 5589.5557963044. Note that the first 3 decimals coincide. The cubic root of 31243134 is about 314.9571924696.

Adding to 31243134 its reverse (43134213), we get a palindrome (74377347).

The spelling of 31243134 in words is "thirty-one million, two hundred forty-three thousand, one hundred thirty-four".