42223429 has 2 divisors, whose sum is σ = 42223430. Its totient is φ = 42223428.

The previous prime is 42223417. The next prime is 42223513. The reversal of 42223429 is 92432224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32798529 + 9424900 = 5727^2 + 3070^2 .

It is a cyclic number.

It is not a de Polignac number, because 42223429 - 2⁵ = 42223397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42223397 and 42223406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42223229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21111714 + 21111715.

It is an arithmetic number, because the mean of its divisors is an integer number (21111715).

Almost surely, 2^42223429 is an apocalyptic number.

It is an amenable number.

42223429 is a deficient number, since it is larger than the sum of its proper divisors (1).

42223429 is an equidigital number, since it uses as much as digits as its factorization.

42223429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 28.

The square root of 42223429 is about 6497.9557554665. The cubic root of 42223429 is about 348.2179597506.

The spelling of 42223429 in words is "forty-two million, two hundred twenty-three thousand, four hundred twenty-nine".