42293209 has 16 divisors (see below), whose sum is σ = 50181120. Its totient is φ = 34891920.

The previous prime is 42293197. The next prime is 42293227. The reversal of 42293209 is 90239224.

It is not a de Polignac number, because 42293209 - 2⁵ = 42293177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42293309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20382 + ... + 22360.

It is an arithmetic number, because the mean of its divisors is an integer number (3136320).

Almost surely, 2^42293209 is an apocalyptic number.

It is an amenable number.

42293209 is a deficient number, since it is larger than the sum of its proper divisors (7887911).

42293209 is a wasteful number, since it uses less digits than its factorization.

42293209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 42293209 is about 6503.3229198618. The cubic root of 42293209 is about 348.4096801332.

The spelling of 42293209 in words is "forty-two million, two hundred ninety-three thousand, two hundred nine".