42311009 has 6 divisors (see below), whose sum is σ = 45816246. Its totient is φ = 39056160.

The previous prime is 42310999. The next prime is 42311033. The reversal of 42311009 is 90011324.

It can be written as a sum of positive squares in 3 ways, for example, as 5161984 + 37149025 = 2272^2 + 6095^2 .

It is not a de Polignac number, because 42311009 - 2²⁴ = 25533793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42311089) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125012 + ... + 125349.

It is an arithmetic number, because the mean of its divisors is an integer number (7636041).

Almost surely, 2^42311009 is an apocalyptic number.

It is an amenable number.

42311009 is a deficient number, since it is larger than the sum of its proper divisors (3505237).

42311009 is a wasteful number, since it uses less digits than its factorization.

42311009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250387 (or 250374 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 42311009 is about 6504.6913070491. The cubic root of 42311009 is about 348.4585518285.

The spelling of 42311009 in words is "forty-two million, three hundred eleven thousand, nine".