31520415111345 has 48 divisors (see below), whose sum is σ = 54880818632640. Its totient is φ = 16735383211392.

The previous prime is 31520415111343. The next prime is 31520415111373. The reversal of 31520415111345 is 54311151402513.

31520415111345 is a `hidden beast` number, since 3 + 1 + 5 + 2 + 0 + 4 + 1 + 511 + 134 + 5 = 666.

It is not a de Polignac number, because 31520415111345 - 2¹ = 31520415111343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31520415111343) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 123545571 + ... + 123800439.

It is an arithmetic number, because the mean of its divisors is an integer number (1143350388180).

Almost surely, 2^{31520415111345} is an apocalyptic number.

It is an amenable number.

31520415111345 is a deficient number, since it is larger than the sum of its proper divisors (23360403521295).

31520415111345 is a wasteful number, since it uses less digits than its factorization.

31520415111345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267214 (or 267211 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

Adding to 31520415111345 its reverse (54311151402513), we get a palindrome (85831566513858).

The spelling of 31520415111345 in words is "thirty-one trillion, five hundred twenty billion, four hundred fifteen million, one hundred eleven thousand, three hundred forty-five".