181230253 has 2 divisors, whose sum is σ = 181230254. Its totient is φ = 181230252.

The previous prime is 181230233. The next prime is 181230277. The reversal of 181230253 is 352032181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166461604 + 14768649 = 12902^2 + 3843^2 .

It is a cyclic number.

It is not a de Polignac number, because 181230253 - 2¹³ = 181222061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181230233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90615126 + 90615127.

It is an arithmetic number, because the mean of its divisors is an integer number (90615127).

Almost surely, 2^181230253 is an apocalyptic number.

It is an amenable number.

181230253 is a deficient number, since it is larger than the sum of its proper divisors (1).

181230253 is an equidigital number, since it uses as much as digits as its factorization.

181230253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 181230253 is about 13462.1786126912. The cubic root of 181230253 is about 565.9050448989.

The spelling of 181230253 in words is "one hundred eighty-one million, two hundred thirty thousand, two hundred fifty-three".