42212523 has 16 divisors (see below), whose sum is σ = 58265856. Its totient is φ = 27162720.

The previous prime is 42212501. The next prime is 42212531. The reversal of 42212523 is 32521224.

It is not a de Polignac number, because 42212523 - 2⁶ = 42212459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42212523.

It is not an unprimeable number, because it can be changed into a prime (42212543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13090 + ... + 15992.

It is an arithmetic number, because the mean of its divisors is an integer number (3641616).

Almost surely, 2^42212523 is an apocalyptic number.

42212523 is a deficient number, since it is larger than the sum of its proper divisors (16053333).

42212523 is a wasteful number, since it uses less digits than its factorization.

42212523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3074.

The product of its digits is 960, while the sum is 21.

The square root of 42212523 is about 6497.1165142700. The cubic root of 42212523 is about 348.1879764595.

Adding to 42212523 its reverse (32521224), we get a palindrome (74733747).

The spelling of 42212523 in words is "forty-two million, two hundred twelve thousand, five hundred twenty-three".