31023132 has 48 divisors (see below), whose sum is σ = 83354880. Its totient is φ = 8796672.

The previous prime is 31023107. The next prime is 31023137. The reversal of 31023132 is 23132013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10348 + ... + 13004.

It is an arithmetic number, because the mean of its divisors is an integer number (1736560).

Almost surely, 2^31023132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31023132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41677440).

31023132 is an abundant number, since it is smaller than the sum of its proper divisors (52331748).

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

31023132 is a wasteful number, since it uses less digits than its factorization.

31023132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810 (or 2808 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 31023132 is about 5569.8412903780. The cubic root of 31023132 is about 314.2161817449.

Adding to 31023132 its reverse (23132013), we get a palindrome (54155145).

The spelling of 31023132 in words is "thirty-one million, twenty-three thousand, one hundred thirty-two".