161315283133 has 2 divisors, whose sum is σ = 161315283134. Its totient is φ = 161315283132.

The previous prime is 161315283029. The next prime is 161315283137. The reversal of 161315283133 is 331382513161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97620628249 + 63694654884 = 312443^2 + 252378^2 .

It is a cyclic number.

It is not a de Polignac number, because 161315283133 - 2³⁷ = 23876329661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161315283092 and 161315283101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161315283137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80657641566 + 80657641567.

It is an arithmetic number, because the mean of its divisors is an integer number (80657641567).

Almost surely, 2^161315283133 is an apocalyptic number.

It is an amenable number.

161315283133 is a deficient number, since it is larger than the sum of its proper divisors (1).

161315283133 is an equidigital number, since it uses as much as digits as its factorization.

161315283133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

Adding to 161315283133 its reverse (331382513161), we get a palindrome (492697796294).

The spelling of 161315283133 in words is "one hundred sixty-one billion, three hundred fifteen million, two hundred eighty-three thousand, one hundred thirty-three".