42278229 has 18 divisors (see below), whose sum is σ = 71039670. Its totient is φ = 24158736.

The previous prime is 42278227. The next prime is 42278231. The reversal of 42278229 is 92287224.

It is a happy number.

42278229 is a `hidden beast` number, since 422 + 7 + 8 + 229 = 666.

It is an interprime number because it is at equal distance from previous prime (42278227) and next prime (42278231).

It can be written as a sum of positive squares in only one way, i.e., 30272004 + 12006225 = 5502^2 + 3465^2 .

It is not a de Polignac number, because 42278229 - 2¹ = 42278227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42278193 and 42278202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42278227) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 47494 + ... + 48375.

Almost surely, 2^42278229 is an apocalyptic number.

42278229 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

42278229 is a deficient number, since it is larger than the sum of its proper divisors (28761441).

42278229 is a wasteful number, since it uses less digits than its factorization.

42278229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95889 (or 95879 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 42278229 is about 6502.1710989484. The cubic root of 42278229 is about 348.3685404053.

The spelling of 42278229 in words is "forty-two million, two hundred seventy-eight thousand, two hundred twenty-nine".