181601325 has 24 divisors (see below), whose sum is σ = 333609600. Its totient is φ = 96853680.

The previous prime is 181601243. The next prime is 181601339. The reversal of 181601325 is 523106181.

It is not a de Polignac number, because 181601325 - 2²⁷ = 47383597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133845 + ... + 135194.

It is an arithmetic number, because the mean of its divisors is an integer number (13900400).

Almost surely, 2^181601325 is an apocalyptic number.

181601325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

181601325 is a deficient number, since it is larger than the sum of its proper divisors (152008275).

181601325 is a wasteful number, since it uses less digits than its factorization.

181601325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269058 (or 269047 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 181601325 is about 13475.9535840697. The cubic root of 181601325 is about 566.2910149669.

The spelling of 181601325 in words is "one hundred eighty-one million, six hundred one thousand, three hundred twenty-five".