31481855048 has 32 divisors (see below), whose sum is σ = 67579747200. Its totient is φ = 13468497792.

The previous prime is 31481855047. The next prime is 31481855057. The reversal of 31481855048 is 84055818413.

It is a super-2 number, since 2×31481855048² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31481854993 and 31481855011.

It is not an unprimeable number, because it can be changed into a prime (31481855047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462140 + ... + 525867.

It is an arithmetic number, because the mean of its divisors is an integer number (2111867100).

Almost surely, 2^31481855048 is an apocalyptic number.

It is an amenable number.

31481855048 is an abundant number, since it is smaller than the sum of its proper divisors (36097892152).

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

31481855048 is a wasteful number, since it uses less digits than its factorization.

31481855048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988589 (or 988585 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 47.

The spelling of 31481855048 in words is "thirty-one billion, four hundred eighty-one million, eight hundred fifty-five thousand, forty-eight".