31145352 has 64 divisors (see below), whose sum is σ = 90347520. Its totient is φ = 8762688.

The previous prime is 31145341. The next prime is 31145369. The reversal of 31145352 is 25354113.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9873 + ... + 12639.

It is an arithmetic number, because the mean of its divisors is an integer number (1411680).

Almost surely, 2^31145352 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 31145352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45173760).

31145352 is an abundant number, since it is smaller than the sum of its proper divisors (59202168).

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

31145352 is a wasteful number, since it uses less digits than its factorization.

31145352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850 (or 2846 counting only the distinct ones).

The product of its digits is 1800, while the sum is 24.

The square root of 31145352 is about 5580.8020928895. The cubic root of 31145352 is about 314.6282740273.

Adding to 31145352 its reverse (25354113), we get a palindrome (56499465).

The spelling of 31145352 in words is "thirty-one million, one hundred forty-five thousand, three hundred fifty-two".