31323303012 has 24 divisors (see below), whose sum is σ = 77386984416. Its totient is φ = 9826918528.

The previous prime is 31323302981. The next prime is 31323303017. The reversal of 31323303012 is 21030332313.

It is a super-2 number, since 2×31323303012² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31323303012.

It is not an unprimeable number, because it can be changed into a prime (31323303017) 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, 76772598 + ... + 76773005.

It is an arithmetic number, because the mean of its divisors is an integer number (3224457684).

Almost surely, 2^31323303012 is an apocalyptic number.

It is an amenable number.

31323303012 is an abundant number, since it is smaller than the sum of its proper divisors (46063681404).

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

31323303012 is a wasteful number, since it uses less digits than its factorization.

31323303012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153545627 (or 153545625 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 31323303012 its reverse (21030332313), we get a palindrome (52353635325).

The spelling of 31323303012 in words is "thirty-one billion, three hundred twenty-three million, three hundred three thousand, twelve".