42520211 has 2 divisors, whose sum is σ = 42520212. Its totient is φ = 42520210.

The previous prime is 42520199. The next prime is 42520217. The reversal of 42520211 is 11202524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42520211 - 2¹⁸ = 42258067 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42520211.

It is not a weakly prime, because it can be changed into another prime (42520217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21260105 + 21260106.

It is an arithmetic number, because the mean of its divisors is an integer number (21260106).

Almost surely, 2^42520211 is an apocalyptic number.

42520211 is a deficient number, since it is larger than the sum of its proper divisors (1).

42520211 is an equidigital number, since it uses as much as digits as its factorization.

42520211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 42520211 is about 6520.7523338952. The cubic root of 42520211 is about 349.0319125286.

Adding to 42520211 its reverse (11202524), we get a palindrome (53722735).

The spelling of 42520211 in words is "forty-two million, five hundred twenty thousand, two hundred eleven".