42232509 has 60 divisors (see below), whose sum is σ = 72096640. Its totient is φ = 24591600.

The previous prime is 42232499. The next prime is 42232523. The reversal of 42232509 is 90523224.

42232509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42232509 - 2¹³ = 42224317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42232109) 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 59 ways as a sum of consecutive naturals, for example, 303762 + ... + 303900.

Almost surely, 2^42232509 is an apocalyptic number.

It is an amenable number.

42232509 is a deficient number, since it is larger than the sum of its proper divisors (29864131).

42232509 is a wasteful number, since it uses less digits than its factorization.

42232509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 42232509 is about 6498.6543991814. The cubic root of 42232509 is about 348.2429189777.

The spelling of 42232509 in words is "forty-two million, two hundred thirty-two thousand, five hundred nine".