42213771 has 16 divisors (see below), whose sum is σ = 66218400. Its totient is φ = 26486784.

The previous prime is 42213761. The next prime is 42213779. The reversal of 42213771 is 17731224.

It is a happy number.

It is not a de Polignac number, because 42213771 - 2⁷ = 42213643 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (42213779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45526 + ... + 46443.

It is an arithmetic number, because the mean of its divisors is an integer number (4138650).

Almost surely, 2^42213771 is an apocalyptic number.

42213771 is a deficient number, since it is larger than the sum of its proper divisors (24004629).

42213771 is a wasteful number, since it uses less digits than its factorization.

42213771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91995 (or 91989 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 42213771 is about 6497.2125561659. The cubic root of 42213771 is about 348.1914077818.

Adding to 42213771 its reverse (17731224), we get a palindrome (59944995).

The spelling of 42213771 in words is "forty-two million, two hundred thirteen thousand, seven hundred seventy-one".