31345470 has 96 divisors (see below), whose sum is σ = 89212032. Its totient is φ = 7589376.

The previous prime is 31345441. The next prime is 31345471. The reversal of 31345470 is 7454313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31345471) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85227 + ... + 85593.

It is an arithmetic number, because the mean of its divisors is an integer number (929292).

Almost surely, 2^31345470 is an apocalyptic number.

31345470 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31345470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44606016).

31345470 is an abundant number, since it is smaller than the sum of its proper divisors (57866562).

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

31345470 is a wasteful number, since it uses less digits than its factorization.

31345470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 31345470 is about 5598.7025282649. The cubic root of 31345470 is about 315.3006954834.

Adding to 31345470 its reverse (7454313), we get a palindrome (38799783).

The spelling of 31345470 in words is "thirty-one million, three hundred forty-five thousand, four hundred seventy".