42512213 has 8 divisors (see below), whose sum is σ = 43095000. Its totient is φ = 41932800.

The previous prime is 42512167. The next prime is 42512219. The reversal of 42512213 is 31221524.

42512213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10510564 + 32001649 = 3242^2 + 5657^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42512213 - 2¹⁴ = 42495829 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 (42512219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33413 + ... + 34661.

It is an arithmetic number, because the mean of its divisors is an integer number (5386875).

Almost surely, 2^42512213 is an apocalyptic number.

It is an amenable number.

42512213 is a deficient number, since it is larger than the sum of its proper divisors (582787).

42512213 is a wasteful number, since it uses less digits than its factorization.

42512213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687.

The product of its digits is 480, while the sum is 20.

The square root of 42512213 is about 6520.1390322600. The cubic root of 42512213 is about 349.0100269969.

Adding to 42512213 its reverse (31221524), we get a palindrome (73733737).

The spelling of 42512213 in words is "forty-two million, five hundred twelve thousand, two hundred thirteen".