42772277 has 4 divisors (see below), whose sum is σ = 42809676. Its totient is φ = 42734880.

The previous prime is 42772273. The next prime is 42772309. The reversal of 42772277 is 77227724.

42772277 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22648081 + 20124196 = 4759^2 + 4486^2 .

It is a cyclic number.

It is not a de Polignac number, because 42772277 - 2² = 42772273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42772277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42772271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16928 + ... + 19289.

It is an arithmetic number, because the mean of its divisors is an integer number (10702419).

Almost surely, 2^42772277 is an apocalyptic number.

It is an amenable number.

42772277 is a deficient number, since it is larger than the sum of its proper divisors (37399).

42772277 is a wasteful number, since it uses less digits than its factorization.

42772277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37398.

The product of its digits is 76832, while the sum is 38.

The square root of 42772277 is about 6540.0517582050. The cubic root of 42772277 is about 349.7202581050.

The spelling of 42772277 in words is "forty-two million, seven hundred seventy-two thousand, two hundred seventy-seven".