42255531 has 12 divisors (see below), whose sum is σ = 63689808. Its totient is φ = 26945424.

The previous prime is 42255527. The next prime is 42255547. The reversal of 42255531 is 13555224.

It is a happy number.

It is not a de Polignac number, because 42255531 - 2² = 42255527 is a prime.

It is a super-2 number, since 2×42255531² = 3571059800183922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42255495 and 42255504.

It is not an unprimeable number, because it can be changed into a prime (42255571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101860 + ... + 102273.

It is an arithmetic number, because the mean of its divisors is an integer number (5307484).

Almost surely, 2^42255531 is an apocalyptic number.

42255531 is a deficient number, since it is larger than the sum of its proper divisors (21434277).

42255531 is a wasteful number, since it uses less digits than its factorization.

42255531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204162 (or 204159 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 42255531 is about 6500.4254476149. The cubic root of 42255531 is about 348.3061861330.

The spelling of 42255531 in words is "forty-two million, two hundred fifty-five thousand, five hundred thirty-one".