31145454020132 has 24 divisors (see below), whose sum is σ = 59700718155960. Its totient is φ = 14151281338880.

The previous prime is 31145454020129. The next prime is 31145454020141. The reversal of 31145454020132 is 23102045454113.

It can be written as a sum of positive squares in 4 ways, for example, as 15929166570496 + 15216287449636 = 3991136^2 + 3900806^2 .

It is a super-2 number, since 2×31145454020132² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31145454020092 and 31145454020101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7896918419 + ... + 7896922362.

It is an arithmetic number, because the mean of its divisors is an integer number (2487529923165).

Almost surely, 2^{31145454020132} is an apocalyptic number.

It is an amenable number.

31145454020132 is a deficient number, since it is larger than the sum of its proper divisors (28555264135828).

31145454020132 is a wasteful number, since it uses less digits than its factorization.

31145454020132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15793840831 (or 15793840829 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 31145454020132 its reverse (23102045454113), we get a palindrome (54247499474245).

The spelling of 31145454020132 in words is "thirty-one trillion, one hundred forty-five billion, four hundred fifty-four million, twenty thousand, one hundred thirty-two".