42211287 has 16 divisors (see below), whose sum is σ = 63310560. Its totient is φ = 28139400.

The previous prime is 42211261. The next prime is 42211297. The reversal of 42211287 is 78211224.

42211287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42211287 - 2¹⁰ = 42210263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 42211287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42211297) 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, 7464 + ... + 11837.

It is an arithmetic number, because the mean of its divisors is an integer number (3956910).

Almost surely, 2^42211287 is an apocalyptic number.

42211287 is a deficient number, since it is larger than the sum of its proper divisors (21099273).

42211287 is an frugal number, since it uses more digits than its factorization.

42211287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19322 (or 19304 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 42211287 is about 6497.0213944545. The cubic root of 42211287 is about 348.1845780641.

The spelling of 42211287 in words is "forty-two million, two hundred eleven thousand, two hundred eighty-seven".