253984221 has 16 divisors (see below), whose sum is σ = 377371200. Its totient is φ = 168828624.

The previous prime is 253984219. The next prime is 253984223. The reversal of 253984221 is 122489352.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (253984219) and next prime (253984223).

It is not a de Polignac number, because 253984221 - 2¹ = 253984219 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253984223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4186 + ... + 22923.

It is an arithmetic number, because the mean of its divisors is an integer number (23585700).

Almost surely, 2^253984221 is an apocalyptic number.

It is an amenable number.

253984221 is a deficient number, since it is larger than the sum of its proper divisors (123386979).

253984221 is a wasteful number, since it uses less digits than its factorization.

253984221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27465 (or 27459 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 253984221 is about 15936.8824115634. The cubic root of 253984221 is about 633.2894388477.

The spelling of 253984221 in words is "two hundred fifty-three million, nine hundred eighty-four thousand, two hundred twenty-one".