31534134405161 has 2 divisors, whose sum is σ = 31534134405162. Its totient is φ = 31534134405160.

The previous prime is 31534134405157. The next prime is 31534134405247. The reversal of 31534134405161 is 16150443143513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30195904206400 + 1338230198761 = 5495080^2 + 1156819^2 .

It is a cyclic number.

It is not a de Polignac number, because 31534134405161 - 2² = 31534134405157 is a prime.

It is not a weakly prime, because it can be changed into another prime (31534134405461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15767067202580 + 15767067202581.

It is an arithmetic number, because the mean of its divisors is an integer number (15767067202581).

Almost surely, 2^{31534134405161} is an apocalyptic number.

It is an amenable number.

31534134405161 is a deficient number, since it is larger than the sum of its proper divisors (1).

31534134405161 is an equidigital number, since it uses as much as digits as its factorization.

31534134405161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 41.

Adding to 31534134405161 its reverse (16150443143513), we get a palindrome (47684577548674).

The spelling of 31534134405161 in words is "thirty-one trillion, five hundred thirty-four billion, one hundred thirty-four million, four hundred five thousand, one hundred sixty-one".