31520414545 has 8 divisors (see below), whose sum is σ = 37828987560. Its totient is φ = 25213338240.

The previous prime is 31520414539. The next prime is 31520414551. The reversal of 31520414545 is 54541402513.

It is an interprime number because it is at equal distance from previous prime (31520414539) and next prime (31520414551).

It can be written as a sum of positive squares in 4 ways, for example, as 5045545024 + 26474869521 = 71032^2 + 162711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31520414545 - 2⁹ = 31520414033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31520414545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327310 + ... + 412519.

It is an arithmetic number, because the mean of its divisors is an integer number (4728623445).

Almost surely, 2^31520414545 is an apocalyptic number.

It is an amenable number.

31520414545 is a deficient number, since it is larger than the sum of its proper divisors (6308573015).

31520414545 is an equidigital number, since it uses as much as digits as its factorization.

31520414545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748355.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 31520414545 in words is "thirty-one billion, five hundred twenty million, four hundred fourteen thousand, five hundred forty-five".