42512219 has 2 divisors, whose sum is σ = 42512220. Its totient is φ = 42512218.

The previous prime is 42512167. The next prime is 42512269. The reversal of 42512219 is 91221524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42512219 is a prime.

It is a super-2 number, since 2×42512219² = 3614577528607922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42512269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21256109 + 21256110.

It is an arithmetic number, because the mean of its divisors is an integer number (21256110).

Almost surely, 2^42512219 is an apocalyptic number.

42512219 is a deficient number, since it is larger than the sum of its proper divisors (1).

42512219 is an equidigital number, since it uses as much as digits as its factorization.

42512219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 42512219 is about 6520.1394923728. The cubic root of 42512219 is about 349.0100434161.

The spelling of 42512219 in words is "forty-two million, five hundred twelve thousand, two hundred nineteen".