42550805 has 16 divisors (see below), whose sum is σ = 58126464. Its totient is φ = 29599680.

The previous prime is 42550799. The next prime is 42550831. The reversal of 42550805 is 50805524.

It is not a de Polignac number, because 42550805 - 2⁸ = 42550549 is a prime.

It is a super-2 number, since 2×42550805² = 3621142012296050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15554 + ... + 18083.

It is an arithmetic number, because the mean of its divisors is an integer number (3632904).

Almost surely, 2^42550805 is an apocalyptic number.

It is an amenable number.

42550805 is a deficient number, since it is larger than the sum of its proper divisors (15575659).

42550805 is a wasteful number, since it uses less digits than its factorization.

42550805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33676.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 42550805 is about 6523.0978070239. The cubic root of 42550805 is about 349.1156038841.

The spelling of 42550805 in words is "forty-two million, five hundred fifty thousand, eight hundred five".