42213557 has 4 divisors (see below), whose sum is σ = 42457740. Its totient is φ = 41969376.

The previous prime is 42213553. The next prime is 42213569. The reversal of 42213557 is 75531224.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17522596 + 24690961 = 4186^2 + 4969^2 .

It is a cyclic number.

It is not a de Polignac number, because 42213557 - 2² = 42213553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42213553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121832 + ... + 122177.

It is an arithmetic number, because the mean of its divisors is an integer number (10614435).

Almost surely, 2^42213557 is an apocalyptic number.

It is an amenable number.

42213557 is a deficient number, since it is larger than the sum of its proper divisors (244183).

42213557 is a wasteful number, since it uses less digits than its factorization.

42213557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244182.

The product of its digits is 8400, while the sum is 29.

The square root of 42213557 is about 6497.1960875442. The cubic root of 42213557 is about 348.1908194028.

The spelling of 42213557 in words is "forty-two million, two hundred thirteen thousand, five hundred fifty-seven".