31231134 has 24 divisors (see below), whose sum is σ = 73819512. Its totient is φ = 9463920.

The previous prime is 31231133. The next prime is 31231139. The reversal of 31231134 is 43113213.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78669 + ... + 79064.

It is an arithmetic number, because the mean of its divisors is an integer number (3075813).

Almost surely, 2^31231134 is an apocalyptic number.

31231134 is an abundant number, since it is smaller than the sum of its proper divisors (42588378).

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

31231134 is a wasteful number, since it uses less digits than its factorization.

31231134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157752 (or 157749 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 31231134 is about 5588.4822626541. The cubic root of 31231134 is about 314.9168639258.

Adding to 31231134 its reverse (43113213), we get a palindrome (74344347).

The spelling of 31231134 in words is "thirty-one million, two hundred thirty-one thousand, one hundred thirty-four".