31440133430120 has 32 divisors (see below), whose sum is σ = 70740476370720. Its totient is φ = 12576022056000.

The previous prime is 31440133430119. The next prime is 31440133430131. The reversal of 31440133430120 is 2103433104413.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21873539 + ... + 23266541.

It is an arithmetic number, because the mean of its divisors is an integer number (2210639886585).

Almost surely, 2^{31440133430120} is an apocalyptic number.

It is an amenable number.

31440133430120 is an abundant number, since it is smaller than the sum of its proper divisors (39300342940600).

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

31440133430120 is a wasteful number, since it uses less digits than its factorization.

31440133430120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957265 (or 1957261 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 31440133430120 its reverse (2103433104413), we get a palindrome (33543566534533).

The spelling of 31440133430120 in words is "thirty-one trillion, four hundred forty billion, one hundred thirty-three million, four hundred thirty thousand, one hundred twenty".