31540215112 has 16 divisors (see below), whose sum is σ = 67586175360. Its totient is φ = 13517235024.

The previous prime is 31540215037. The next prime is 31540215121. The reversal of 31540215112 is 21151204513.

It is a super-2 number, since 2×31540215112² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281609008 + ... + 281609119.

It is an arithmetic number, because the mean of its divisors is an integer number (4224135960).

Almost surely, 2^31540215112 is an apocalyptic number.

It is an amenable number.

31540215112 is an abundant number, since it is smaller than the sum of its proper divisors (36045960248).

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

31540215112 is a wasteful number, since it uses less digits than its factorization.

31540215112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563218140 (or 563218136 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 31540215112 its reverse (21151204513), we get a palindrome (52691419625).

The spelling of 31540215112 in words is "thirty-one billion, five hundred forty million, two hundred fifteen thousand, one hundred twelve".