31200423140 has 48 divisors (see below), whose sum is σ = 67801088880. Its totient is φ = 12046110720.

The previous prime is 31200423113. The next prime is 31200423143. The reversal of 31200423140 is 4132400213.

It can be written as a sum of positive squares in 8 ways, for example, as 1428991204 + 29771431936 = 37802^2 + 172544^2 .

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 (31200423143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2569724 + ... + 2581836.

It is an arithmetic number, because the mean of its divisors is an integer number (1412522685).

Almost surely, 2^31200423140 is an apocalyptic number.

It is an amenable number.

31200423140 is an abundant number, since it is smaller than the sum of its proper divisors (36600665740).

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

31200423140 is a wasteful number, since it uses less digits than its factorization.

31200423140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16592 (or 16590 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31200423140 its reverse (4132400213), we get a palindrome (35332823353).

The spelling of 31200423140 in words is "thirty-one billion, two hundred million, four hundred twenty-three thousand, one hundred forty".