42142213 has 2 divisors, whose sum is σ = 42142214. Its totient is φ = 42142212.

The previous prime is 42142211. The next prime is 42142229. The reversal of 42142213 is 31224124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41177889 + 964324 = 6417^2 + 982^2 .

It is a cyclic number.

It is not a de Polignac number, because 42142213 - 2¹ = 42142211 is a prime.

It is a super-2 number, since 2×42142213² = 3551932233074738, which contains 22 as substring.

Together with 42142211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42142211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21071106 + 21071107.

It is an arithmetic number, because the mean of its divisors is an integer number (21071107).

Almost surely, 2^42142213 is an apocalyptic number.

It is an amenable number.

42142213 is a deficient number, since it is larger than the sum of its proper divisors (1).

42142213 is an equidigital number, since it uses as much as digits as its factorization.

42142213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 19.

The square root of 42142213 is about 6491.7033974143. The cubic root of 42142213 is about 347.9945528059.

Adding to 42142213 its reverse (31224124), we get a palindrome (73366337).

The spelling of 42142213 in words is "forty-two million, one hundred forty-two thousand, two hundred thirteen".