31032313123261 has 2 divisors, whose sum is σ = 31032313123262. Its totient is φ = 31032313123260.

The previous prime is 31032313123243. The next prime is 31032313123313. The reversal of 31032313123261 is 16232131323013.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28578058764025 + 2454254359236 = 5345845^2 + 1566606^2 .

It is a cyclic number.

It is not a de Polignac number, because 31032313123261 - 2¹⁷ = 31032312992189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31032313123961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15516156561630 + 15516156561631.

It is an arithmetic number, because the mean of its divisors is an integer number (15516156561631).

Almost surely, 2^{31032313123261} is an apocalyptic number.

It is an amenable number.

31032313123261 is a deficient number, since it is larger than the sum of its proper divisors (1).

31032313123261 is an equidigital number, since it uses as much as digits as its factorization.

31032313123261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 31.

Adding to 31032313123261 its reverse (16232131323013), we get a palindrome (47264444446274).

The spelling of 31032313123261 in words is "thirty-one trillion, thirty-two billion, three hundred thirteen million, one hundred twenty-three thousand, two hundred sixty-one".