42213855 has 32 divisors (see below), whose sum is σ = 72405504. Its totient is φ = 20946816.

The previous prime is 42213841. The next prime is 42213863. The reversal of 42213855 is 55831224.

It is not a de Polignac number, because 42213855 - 2⁹ = 42213343 is a prime.

It is a super-2 number, since 2×42213855² = 3564019107922050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11112 + ... + 14418.

It is an arithmetic number, because the mean of its divisors is an integer number (2262672).

Almost surely, 2^42213855 is an apocalyptic number.

42213855 is a deficient number, since it is larger than the sum of its proper divisors (30191649).

42213855 is a wasteful number, since it uses less digits than its factorization.

42213855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375.

The product of its digits is 9600, while the sum is 30.

The square root of 42213855 is about 6497.2190204733. The cubic root of 42213855 is about 348.1916387338.

Adding to 42213855 its product of digits (9600), we get a triangular number (42223455 = T₉₁₈₉).

The spelling of 42213855 in words is "forty-two million, two hundred thirteen thousand, eight hundred fifty-five".