42553881 has 12 divisors (see below), whose sum is σ = 61601280. Its totient is φ = 28307160.

The previous prime is 42553871. The next prime is 42553891. The reversal of 42553881 is 18835524.

It is a happy number.

42553881 is a `hidden beast` number, since 42 + 5 + 538 + 81 = 666.

It is an interprime number because it is at equal distance from previous prime (42553871) and next prime (42553891).

It is not a de Polignac number, because 42553881 - 2²¹ = 40456729 is a prime.

It is a super-2 number, since 2×42553881² = 3621665576324322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42553871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 625 + ... + 9246.

It is an arithmetic number, because the mean of its divisors is an integer number (5133440).

Almost surely, 2^42553881 is an apocalyptic number.

It is an amenable number.

42553881 is a deficient number, since it is larger than the sum of its proper divisors (19047399).

42553881 is a wasteful number, since it uses less digits than its factorization.

42553881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10356 (or 10353 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 42553881 is about 6523.3335803100. Note that the first 3 decimals coincide. The cubic root of 42553881 is about 349.1240162101.

It can be divided in two parts, 42553 and 881, that added together give a palindrome (43434).

The spelling of 42553881 in words is "forty-two million, five hundred fifty-three thousand, eight hundred eighty-one".