161153325 has 36 divisors (see below), whose sum is σ = 289603860. Its totient is φ = 85662720.

The previous prime is 161153309. The next prime is 161153347. The reversal of 161153325 is 523351161.

It can be written as a sum of positive squares in 6 ways, for example, as 4052169 + 157101156 = 2013^2 + 12534^2 .

It is not a de Polignac number, because 161153325 - 2⁴ = 161153309 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 78411 + ... + 80439.

Almost surely, 2^161153325 is an apocalyptic number.

161153325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161153325 is a deficient number, since it is larger than the sum of its proper divisors (128450535).

161153325 is a wasteful number, since it uses less digits than its factorization.

161153325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398 (or 2390 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 161153325 is about 12694.6179540780. The cubic root of 161153325 is about 544.1848206445.

The spelling of 161153325 in words is "one hundred sixty-one million, one hundred fifty-three thousand, three hundred twenty-five".