31520452213361 has 2 divisors, whose sum is σ = 31520452213362. Its totient is φ = 31520452213360.

The previous prime is 31520452213309. The next prime is 31520452213423. The reversal of 31520452213361 is 16331225402513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30181673626225 + 1338778587136 = 5493785^2 + 1157056^2 .

It is a cyclic number.

It is not a de Polignac number, because 31520452213361 - 2¹⁸ = 31520451951217 is a prime.

It is not a weakly prime, because it can be changed into another prime (31520452213661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15760226106680 + 15760226106681.

It is an arithmetic number, because the mean of its divisors is an integer number (15760226106681).

Almost surely, 2^{31520452213361} is an apocalyptic number.

It is an amenable number.

31520452213361 is a deficient number, since it is larger than the sum of its proper divisors (1).

31520452213361 is an equidigital number, since it uses as much as digits as its factorization.

31520452213361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 31520452213361 its reverse (16331225402513), we get a palindrome (47851677615874).

The spelling of 31520452213361 in words is "thirty-one trillion, five hundred twenty billion, four hundred fifty-two million, two hundred thirteen thousand, three hundred sixty-one".