31225452212 has 24 divisors (see below), whose sum is σ = 56617021440. Its totient is φ = 15052906080.

The previous prime is 31225452197. The next prime is 31225452239. The reversal of 31225452212 is 21225452213.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434708 + ... + 501419.

It is an arithmetic number, because the mean of its divisors is an integer number (2359042560).

Almost surely, 2^31225452212 is an apocalyptic number.

It is an amenable number.

31225452212 is a deficient number, since it is larger than the sum of its proper divisors (25391569228).

31225452212 is a wasteful number, since it uses less digits than its factorization.

31225452212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936431 (or 936429 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

Subtracting from 31225452212 its reverse (21225452213), we obtain a palindrome (9999999999).

The spelling of 31225452212 in words is "thirty-one billion, two hundred twenty-five million, four hundred fifty-two thousand, two hundred twelve".