42213561 has 8 divisors (see below), whose sum is σ = 60614400. Its totient is φ = 25977552.

The previous prime is 42213553. The next prime is 42213569. The reversal of 42213561 is 16531224.

It is an interprime number because it is at equal distance from previous prime (42213553) and next prime (42213569).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42213561 - 2³ = 42213553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42213569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541161 + ... + 541238.

It is an arithmetic number, because the mean of its divisors is an integer number (7576800).

Almost surely, 2^42213561 is an apocalyptic number.

It is an amenable number.

42213561 is a deficient number, since it is larger than the sum of its proper divisors (18400839).

42213561 is a wasteful number, since it uses less digits than its factorization.

42213561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082415.

The product of its digits is 1440, while the sum is 24.

The square root of 42213561 is about 6497.1963953693. The cubic root of 42213561 is about 348.1908304006.

Adding to 42213561 its reverse (16531224), we get a palindrome (58744785).

The spelling of 42213561 in words is "forty-two million, two hundred thirteen thousand, five hundred sixty-one".