31400265512 has 32 divisors (see below), whose sum is σ = 73403219520. Its totient is φ = 12233869440.

The previous prime is 31400265509. The next prime is 31400265517. The reversal of 31400265512 is 21556200413.

It is not an unprimeable number, because it can be changed into a prime (31400265517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25486613 + ... + 25487844.

It is an arithmetic number, because the mean of its divisors is an integer number (2293850610).

Almost surely, 2^31400265512 is an apocalyptic number.

It is an amenable number.

31400265512 is an abundant number, since it is smaller than the sum of its proper divisors (42002954008).

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

31400265512 is a wasteful number, since it uses less digits than its factorization.

31400265512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50974481 (or 50974477 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 31400265512 its reverse (21556200413), we get a palindrome (52956465925).

The spelling of 31400265512 in words is "thirty-one billion, four hundred million, two hundred sixty-five thousand, five hundred twelve".