42255547 has 2 divisors, whose sum is σ = 42255548. Its totient is φ = 42255546.

The previous prime is 42255527. The next prime is 42255553. The reversal of 42255547 is 74555224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42255547 - 2²³ = 33866939 is a prime.

It is not a weakly prime, because it can be changed into another prime (42255527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21127773 + 21127774.

It is an arithmetic number, because the mean of its divisors is an integer number (21127774).

Almost surely, 2^42255547 is an apocalyptic number.

42255547 is a deficient number, since it is larger than the sum of its proper divisors (1).

42255547 is an equidigital number, since it uses as much as digits as its factorization.

42255547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56000, while the sum is 34.

The square root of 42255547 is about 6500.4266783035. The cubic root of 42255547 is about 348.3062300949.

The spelling of 42255547 in words is "forty-two million, two hundred fifty-five thousand, five hundred forty-seven".