181325225381 has 8 divisors (see below), whose sum is σ = 183818386944. Its totient is φ = 178832314080.

The previous prime is 181325225377. The next prime is 181325225383. The reversal of 181325225381 is 183522523181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 181325225381 - 2² = 181325225377 is a prime.

It is a super-2 number, since 2×181325225381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181325225383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1757846 + ... + 1858136.

It is an arithmetic number, because the mean of its divisors is an integer number (22977298368).

Almost surely, 2^181325225381 is an apocalyptic number.

It is an amenable number.

181325225381 is a deficient number, since it is larger than the sum of its proper divisors (2493161563).

181325225381 is a wasteful number, since it uses less digits than its factorization.

181325225381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125131.

The product of its digits is 115200, while the sum is 41.

The spelling of 181325225381 in words is "one hundred eighty-one billion, three hundred twenty-five million, two hundred twenty-five thousand, three hundred eighty-one".