42228547 has 2 divisors, whose sum is σ = 42228548. Its totient is φ = 42228546.

The previous prime is 42228533. The next prime is 42228551. The reversal of 42228547 is 74582224.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42228547 is a prime.

It is not a weakly prime, because it can be changed into another prime (42228577) 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 as a sum of consecutive naturals, namely, 21114273 + 21114274.

It is an arithmetic number, because the mean of its divisors is an integer number (21114274).

Almost surely, 2^42228547 is an apocalyptic number.

42228547 is a deficient number, since it is larger than the sum of its proper divisors (1).

42228547 is an equidigital number, since it uses as much as digits as its factorization.

42228547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35840, while the sum is 34.

The square root of 42228547 is about 6498.3495596959. The cubic root of 42228547 is about 348.2320286183.

It can be divided in two parts, 4222 and 8547, that added together give a square (12769 = 113²).

The spelling of 42228547 in words is "forty-two million, two hundred twenty-eight thousand, five hundred forty-seven".