31144440340 has 24 divisors (see below), whose sum is σ = 70434350280. Its totient is φ = 11499485568.

The previous prime is 31144440269. The next prime is 31144440427. The reversal of 31144440340 is 4304444113.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2888847504 + 28255592836 = 53748^2 + 168094^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31144440299 and 31144440308.

It is a congruent number.

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, 59892895 + ... + 59893414.

It is an arithmetic number, because the mean of its divisors is an integer number (2934764595).

Almost surely, 2^31144440340 is an apocalyptic number.

It is an amenable number.

31144440340 is an abundant number, since it is smaller than the sum of its proper divisors (39289909940).

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

31144440340 is a wasteful number, since it uses less digits than its factorization.

31144440340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119786331 (or 119786329 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 31144440340 its reverse (4304444113), we get a palindrome (35448884453).

The spelling of 31144440340 in words is "thirty-one billion, one hundred forty-four million, four hundred forty thousand, three hundred forty".