253944481 has 16 divisors (see below), whose sum is σ = 306754560. Its totient is φ = 205362000.

The previous prime is 253944479. The next prime is 253944499. The reversal of 253944481 is 184449352.

It is a cyclic number.

It is not a de Polignac number, because 253944481 - 2¹ = 253944479 is a prime.

It is a super-2 number, since 2×253944481² = 128975598860718722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253944421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29580 + ... + 37186.

It is an arithmetic number, because the mean of its divisors is an integer number (19172160).

Almost surely, 2^253944481 is an apocalyptic number.

It is an amenable number.

253944481 is a deficient number, since it is larger than the sum of its proper divisors (52810079).

253944481 is a wasteful number, since it uses less digits than its factorization.

253944481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7884.

The product of its digits is 138240, while the sum is 40.

The square root of 253944481 is about 15935.6355693772. The cubic root of 253944481 is about 633.2564076159.

The spelling of 253944481 in words is "two hundred fifty-three million, nine hundred forty-four thousand, four hundred eighty-one".