31403065505140 has 36 divisors (see below), whose sum is σ = 76713202879236. Its totient is φ = 10766765315712.

The previous prime is 31403065505117. The next prime is 31403065505219. The reversal of 31403065505140 is 4150556030413.

It can be written as a sum of positive squares in 2 ways, for example, as 8080386130404 + 23322679374736 = 2842602^2 + 4829356^2 .

It is a super-2 number, since 2×31403065505140² (a number of 28 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 31403065505140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16021971217 + ... + 16021973176.

It is an arithmetic number, because the mean of its divisors is an integer number (2130922302201).

Almost surely, 2^{31403065505140} is an apocalyptic number.

It is an amenable number.

31403065505140 is an abundant number, since it is smaller than the sum of its proper divisors (45310137374096).

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

31403065505140 is a wasteful number, since it uses less digits than its factorization.

31403065505140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32043944416 (or 32043944407 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 31403065505140 in words is "thirty-one trillion, four hundred three billion, sixty-five million, five hundred five thousand, one hundred forty".