161325253 has 2 divisors, whose sum is σ = 161325254. Its totient is φ = 161325252.

The previous prime is 161325247. The next prime is 161325299. The reversal of 161325253 is 352523161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93064609 + 68260644 = 9647^2 + 8262^2 .

It is a cyclic number.

It is not a de Polignac number, because 161325253 - 2⁵ = 161325221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161325653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80662626 + 80662627.

It is an arithmetic number, because the mean of its divisors is an integer number (80662627).

Almost surely, 2^161325253 is an apocalyptic number.

It is an amenable number.

161325253 is a deficient number, since it is larger than the sum of its proper divisors (1).

161325253 is an equidigital number, since it uses as much as digits as its factorization.

161325253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 28.

The square root of 161325253 is about 12701.3878375554. The cubic root of 161325253 is about 544.3782748297.

The spelling of 161325253 in words is "one hundred sixty-one million, three hundred twenty-five thousand, two hundred fifty-three".