31345356 has 48 divisors (see below), whose sum is σ = 84471296. Its totient is φ = 8861184.

The previous prime is 31345339. The next prime is 31345357. The reversal of 31345356 is 65354313.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31345357) 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, 6225 + ... + 10071.

Almost surely, 2^31345356 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 31345356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42235648).

31345356 is an abundant number, since it is smaller than the sum of its proper divisors (53125940).

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

31345356 is a wasteful number, since it uses less digits than its factorization.

31345356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3958 (or 3956 counting only the distinct ones).

The product of its digits is 16200, while the sum is 30.

The square root of 31345356 is about 5598.6923473254. The cubic root of 31345356 is about 315.3003132450.

Adding to 31345356 its reverse (65354313), we get a palindrome (96699669).

The spelling of 31345356 in words is "thirty-one million, three hundred forty-five thousand, three hundred fifty-six".