31305234 has 16 divisors (see below), whose sum is σ = 62684640. Its totient is φ = 10422720.

The previous prime is 31305233. The next prime is 31305259. The reversal of 31305234 is 43250313.

It is a self number, because there is not a number n which added to its sum of digits gives 31305234.

It is not an unprimeable number, because it can be changed into a prime (31305233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3469 + ... + 8639.

It is an arithmetic number, because the mean of its divisors is an integer number (3917790).

Almost surely, 2^31305234 is an apocalyptic number.

31305234 is an abundant number, since it is smaller than the sum of its proper divisors (31379406).

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

31305234 is a wasteful number, since it uses less digits than its factorization.

31305234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6185.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 31305234 is about 5595.1080418523. The cubic root of 31305234 is about 315.1657278587.

Adding to 31305234 its reverse (43250313), we get a palindrome (74555547).

The spelling of 31305234 in words is "thirty-one million, three hundred five thousand, two hundred thirty-four".