42213261 has 16 divisors (see below), whose sum is σ = 60609600. Its totient is φ = 26035968.

The previous prime is 42213233. The next prime is 42213271. The reversal of 42213261 is 16231224.

It is not a de Polignac number, because 42213261 - 2⁷ = 42213133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42213271) 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, 4006 + ... + 10023.

It is an arithmetic number, because the mean of its divisors is an integer number (3788100).

Almost surely, 2^42213261 is an apocalyptic number.

It is an amenable number.

42213261 is a deficient number, since it is larger than the sum of its proper divisors (18396339).

42213261 is a wasteful number, since it uses less digits than its factorization.

42213261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14108.

The product of its digits is 576, while the sum is 21.

The square root of 42213261 is about 6497.1733084473. The cubic root of 42213261 is about 348.1900055669.

Adding to 42213261 its reverse (16231224), we get a palindrome (58444485).

The spelling of 42213261 in words is "forty-two million, two hundred thirteen thousand, two hundred sixty-one".