31244311212 has 48 divisors (see below), whose sum is σ = 73110758112. Its totient is φ = 10385190400.

The previous prime is 31244311193. The next prime is 31244311243. The reversal of 31244311212 is 21211344213.

It is a super-2 number, since 2×31244311212² (a number of 22 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 8694088 + ... + 8697680.

It is an arithmetic number, because the mean of its divisors is an integer number (1523140794).

Almost surely, 2^31244311212 is an apocalyptic number.

It is an amenable number.

31244311212 is an abundant number, since it is smaller than the sum of its proper divisors (41866446900).

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

31244311212 is a wasteful number, since it uses less digits than its factorization.

31244311212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5458 (or 5456 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 31244311212 its reverse (21211344213), we get a palindrome (52455655425).

The spelling of 31244311212 in words is "thirty-one billion, two hundred forty-four million, three hundred eleven thousand, two hundred twelve".