31467743540 has 96 divisors (see below), whose sum is σ = 68821189920. Its totient is φ = 12076646400.

The previous prime is 31467743539. The next prime is 31467743543. The reversal of 31467743540 is 4534776413.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 19949302564 + 11518440976 = 141242^2 + 107324^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31467743491 and 31467743500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31467743543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31186556 + ... + 31187564.

It is an arithmetic number, because the mean of its divisors is an integer number (716887395).

Almost surely, 2^31467743540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31467743540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34410594960).

31467743540 is an abundant number, since it is smaller than the sum of its proper divisors (37353446380).

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

31467743540 is a wasteful number, since it uses less digits than its factorization.

31467743540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653 (or 1651 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 44.

The spelling of 31467743540 in words is "thirty-one billion, four hundred sixty-seven million, seven hundred forty-three thousand, five hundred forty".