253981583 has 4 divisors (see below), whose sum is σ = 254245200. Its totient is φ = 253717968.

The previous prime is 253981549. The next prime is 253981597. The reversal of 253981583 is 385189352.

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

It is a cyclic number.

It is not a de Polignac number, because 253981583 - 2⁸ = 253981327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253987583) 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, 130358 + ... + 132291.

It is an arithmetic number, because the mean of its divisors is an integer number (63561300).

Almost surely, 2^253981583 is an apocalyptic number.

253981583 is a deficient number, since it is larger than the sum of its proper divisors (263617).

253981583 is an equidigital number, since it uses as much as digits as its factorization.

253981583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263616.

The product of its digits is 259200, while the sum is 44.

The square root of 253981583 is about 15936.7996473571. The cubic root of 253981583 is about 633.2872462924.

The spelling of 253981583 in words is "two hundred fifty-three million, nine hundred eighty-one thousand, five hundred eighty-three".