42211161 has 12 divisors (see below), whose sum is σ = 62122788. Its totient is φ = 27609504.

The previous prime is 42211157. The next prime is 42211163. The reversal of 42211161 is 16111224.

It can be written as a sum of positive squares in 2 ways, for example, as 16353936 + 25857225 = 4044^2 + 5085^2 .

It is not a de Polignac number, because 42211161 - 2² = 42211157 is a prime.

It is a super-2 number, since 2×42211161² = 3563564225935842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42211163) 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, 43770 + ... + 44723.

It is an arithmetic number, because the mean of its divisors is an integer number (5176899).

Almost surely, 2^42211161 is an apocalyptic number.

It is an amenable number.

42211161 is a deficient number, since it is larger than the sum of its proper divisors (19911627).

42211161 is a wasteful number, since it uses less digits than its factorization.

42211161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88552 (or 88549 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 42211161 is about 6497.0116976961. The cubic root of 42211161 is about 348.1842316220.

Adding to 42211161 its reverse (16111224), we get a palindrome (58322385).

The spelling of 42211161 in words is "forty-two million, two hundred eleven thousand, one hundred sixty-one".