31240304210420 has 48 divisors (see below), whose sum is σ = 66283491991248. Its totient is φ = 12366826106880.

The previous prime is 31240304210393. The next prime is 31240304210431. The reversal of 31240304210420 is 2401240304213.

It can be written as a sum of positive squares in 8 ways, for example, as 169445843044 + 31070858367376 = 411638^2 + 5574124^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31240304210420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53215214 + ... + 53799066.

It is an arithmetic number, because the mean of its divisors is an integer number (1380906083151).

Almost surely, 2^{31240304210420} is an apocalyptic number.

It is an amenable number.

31240304210420 is an abundant number, since it is smaller than the sum of its proper divisors (35043187780828).

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

31240304210420 is a wasteful number, since it uses less digits than its factorization.

31240304210420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611540 (or 611538 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 31240304210420 its reverse (2401240304213), we get a palindrome (33641544514633).

The spelling of 31240304210420 in words is "thirty-one trillion, two hundred forty billion, three hundred four million, two hundred ten thousand, four hundred twenty".