181225351 has 2 divisors, whose sum is σ = 181225352. Its totient is φ = 181225350.

The previous prime is 181225309. The next prime is 181225357. The reversal of 181225351 is 153522181.

It is a strong prime.

It is an emirp because it is prime and its reverse (153522181) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181225351 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181225357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90612675 + 90612676.

It is an arithmetic number, because the mean of its divisors is an integer number (90612676).

Almost surely, 2^181225351 is an apocalyptic number.

181225351 is a deficient number, since it is larger than the sum of its proper divisors (1).

181225351 is an equidigital number, since it uses as much as digits as its factorization.

181225351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 28.

The square root of 181225351 is about 13461.9965458323. The cubic root of 181225351 is about 565.8999425654.

The spelling of 181225351 in words is "one hundred eighty-one million, two hundred twenty-five thousand, three hundred fifty-one".