31212303340 has 24 divisors (see below), whose sum is σ = 65938334112. Its totient is φ = 12410160000.

The previous prime is 31212303337. The next prime is 31212303361. The reversal of 31212303340 is 4330321213.

It is a super-3 number, since 3×31212303340³ (a number of 32 digits) contains 333 as substring.

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, 4669161 + ... + 4675840.

It is an arithmetic number, because the mean of its divisors is an integer number (2747430588).

Almost surely, 2^31212303340 is an apocalyptic number.

It is an amenable number.

31212303340 is an abundant number, since it is smaller than the sum of its proper divisors (34726030772).

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

31212303340 is a wasteful number, since it uses less digits than its factorization.

31212303340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9345177 (or 9345175 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31212303340 its reverse (4330321213), we get a palindrome (35542624553).

The spelling of 31212303340 in words is "thirty-one billion, two hundred twelve million, three hundred three thousand, three hundred forty".