31520452213340 has 48 divisors (see below), whose sum is σ = 66222164542464. Its totient is φ = 12602616998400.

The previous prime is 31520452213309. The next prime is 31520452213361. The reversal of 31520452213340 is 4331225402513.

It is a self number, because there is not a number n which added to its sum of digits gives 31520452213340.

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, 908693477 + ... + 908728163.

It is an arithmetic number, because the mean of its divisors is an integer number (1379628427968).

Almost surely, 2^{31520452213340} is an apocalyptic number.

It is an amenable number.

31520452213340 is an abundant number, since it is smaller than the sum of its proper divisors (34701712329124).

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

31520452213340 is a wasteful number, since it uses less digits than its factorization.

31520452213340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53438 (or 53436 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 31520452213340 its reverse (4331225402513), we get a palindrome (35851677615853).

The spelling of 31520452213340 in words is "thirty-one trillion, five hundred twenty billion, four hundred fifty-two million, two hundred thirteen thousand, three hundred forty".