180253021 has 4 divisors (see below), whose sum is σ = 194118652. Its totient is φ = 166387392.

The previous prime is 180252997. The next prime is 180253027. The reversal of 180253021 is 120352081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95355225 + 84897796 = 9765^2 + 9214^2 .

It is a cyclic number.

It is not a de Polignac number, because 180253021 - 2⁹ = 180252509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 180252983 and 180253001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180253027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6932796 + ... + 6932821.

It is an arithmetic number, because the mean of its divisors is an integer number (48529663).

Almost surely, 2^180253021 is an apocalyptic number.

It is an amenable number.

180253021 is a deficient number, since it is larger than the sum of its proper divisors (13865631).

180253021 is a wasteful number, since it uses less digits than its factorization.

180253021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13865630.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 180253021 is about 13425.8340895454. The cubic root of 180253021 is about 564.8860511061.

The spelling of 180253021 in words is "one hundred eighty million, two hundred fifty-three thousand, twenty-one".