31133132 has 12 divisors (see below), whose sum is σ = 55955760. Its totient is φ = 15145776.

The previous prime is 31133131. The next prime is 31133147. The reversal of 31133132 is 23133113.

It is a self number, because there is not a number n which added to its sum of digits gives 31133132.

It is not an unprimeable number, because it can be changed into a prime (31133131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105032 + ... + 105327.

It is an arithmetic number, because the mean of its divisors is an integer number (4662980).

Almost surely, 2^31133132 is an apocalyptic number.

It is an amenable number.

31133132 is a deficient number, since it is larger than the sum of its proper divisors (24822628).

31133132 is a wasteful number, since it uses less digits than its factorization.

31133132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210400 (or 210398 counting only the distinct ones).

The product of its digits is 162, while the sum is 17.

The square root of 31133132 is about 5579.7071607747. The cubic root of 31133132 is about 314.5871201022.

Adding to 31133132 its reverse (23133113), we get a palindrome (54266245).

The spelling of 31133132 in words is "thirty-one million, one hundred thirty-three thousand, one hundred thirty-two".