13031211440 has 60 divisors (see below), whose sum is σ = 32807458224. Its totient is φ = 4811519232.

The previous prime is 13031211439. The next prime is 13031211449. The reversal of 13031211440 is 4411213031.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (13031211449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 468404 + ... + 495443.

Almost surely, 2^13031211440 is an apocalyptic number.

13031211440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13031211440 is an abundant number, since it is smaller than the sum of its proper divisors (19776246784).

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

13031211440 is a wasteful number, since it uses less digits than its factorization.

13031211440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963886 (or 963867 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 13031211440 its reverse (4411213031), we get a palindrome (17442424471).

The spelling of 13031211440 in words is "thirteen billion, thirty-one million, two hundred eleven thousand, four hundred forty".