253063021 has 4 divisors (see below), whose sum is σ = 253198044. Its totient is φ = 252928000.

The previous prime is 253063007. The next prime is 253063079. The reversal of 253063021 is 120360352.

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 146168100 + 106894921 = 12090^2 + 10339^2 .

It is a cyclic number.

It is not a de Polignac number, because 253063021 - 2⁷ = 253062893 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253062983 and 253063001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253063001) 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, 64660 + ... + 68461.

It is an arithmetic number, because the mean of its divisors is an integer number (63299511).

Almost surely, 2^253063021 is an apocalyptic number.

It is an amenable number.

253063021 is a deficient number, since it is larger than the sum of its proper divisors (135023).

253063021 is a wasteful number, since it uses less digits than its factorization.

253063021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135022.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 253063021 is about 15907.9546453967. The cubic root of 253063021 is about 632.5228650204.

The spelling of 253063021 in words is "two hundred fifty-three million, sixty-three thousand, twenty-one".