181225343 has 4 divisors (see below), whose sum is σ = 195165768. Its totient is φ = 167284920.

The previous prime is 181225309. The next prime is 181225351. The reversal of 181225343 is 343522181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 343522181 = 23 ⋅14935747.

It is a cyclic number.

It is not a de Polignac number, because 181225343 - 2²² = 177031039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181225393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6970193 + ... + 6970218.

It is an arithmetic number, because the mean of its divisors is an integer number (48791442).

Almost surely, 2^181225343 is an apocalyptic number.

181225343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

181225343 is a deficient number, since it is larger than the sum of its proper divisors (13940425).

181225343 is a wasteful number, since it uses less digits than its factorization.

181225343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13940424.

The product of its digits is 5760, while the sum is 29.

The square root of 181225343 is about 13461.9962486995. The cubic root of 181225343 is about 565.8999342384.

The spelling of 181225343 in words is "one hundred eighty-one million, two hundred twenty-five thousand, three hundred forty-three".