42553281 has 8 divisors (see below), whose sum is σ = 57051904. Its totient is φ = 28211760.

The previous prime is 42553279. The next prime is 42553307. The reversal of 42553281 is 18235524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42553281 - 2¹ = 42553279 is a prime.

It is a super-2 number, since 2×42553281² = 3621563447729922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42553681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38641 + ... + 39726.

It is an arithmetic number, because the mean of its divisors is an integer number (7131488).

Almost surely, 2^42553281 is an apocalyptic number.

It is an amenable number.

42553281 is a deficient number, since it is larger than the sum of its proper divisors (14498623).

42553281 is a wasteful number, since it uses less digits than its factorization.

42553281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78551.

The product of its digits is 9600, while the sum is 30.

The square root of 42553281 is about 6523.2875913913. The cubic root of 42553281 is about 349.1223753461.

The spelling of 42553281 in words is "forty-two million, five hundred fifty-three thousand, two hundred eighty-one".