31145053051240 has 16 divisors (see below), whose sum is σ = 70076369365380. Its totient is φ = 12458021220480.

The previous prime is 31145053051141. The next prime is 31145053051243. The reversal of 31145053051240 is 4215035054113.

It can be written as a sum of positive squares in 2 ways, for example, as 26344054961316 + 4800998089924 = 5132646^2 + 2191118^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31145053051196 and 31145053051205.

It is not an unprimeable number, because it can be changed into a prime (31145053051243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389313163101 + ... + 389313163180.

Almost surely, 2^{31145053051240} is an apocalyptic number.

It is an amenable number.

31145053051240 is an abundant number, since it is smaller than the sum of its proper divisors (38931316314140).

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

31145053051240 is a wasteful number, since it uses less digits than its factorization.

31145053051240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778626326292 (or 778626326288 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 31145053051240 in words is "thirty-one trillion, one hundred forty-five billion, fifty-three million, fifty-one thousand, two hundred forty".