42216077 has 4 divisors (see below), whose sum is σ = 42321756. Its totient is φ = 42110400.

The previous prime is 42216061. The next prime is 42216113. The reversal of 42216077 is 77061224.

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 34269316 + 7946761 = 5854^2 + 2819^2 .

It is a cyclic number.

It is not a de Polignac number, because 42216077 - 2⁴ = 42216061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42216007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52238 + ... + 53039.

It is an arithmetic number, because the mean of its divisors is an integer number (10580439).

Almost surely, 2^42216077 is an apocalyptic number.

It is an amenable number.

42216077 is a deficient number, since it is larger than the sum of its proper divisors (105679).

42216077 is a wasteful number, since it uses less digits than its factorization.

42216077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105678.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 42216077 is about 6497.3900144597. The cubic root of 42216077 is about 348.1977478516.

The spelling of 42216077 in words is "forty-two million, two hundred sixteen thousand, seventy-seven".