42207231 has 16 divisors (see below), whose sum is σ = 64062720. Its totient is φ = 24467520.

The previous prime is 42207223. The next prime is 42207247. The reversal of 42207231 is 13270224.

It is not a de Polignac number, because 42207231 - 2³ = 42207223 is a prime.

It is a super-2 number, since 2×42207231² = 3562900697374722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42207198 and 42207207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42207131) 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, 27046 + ... + 28563.

It is an arithmetic number, because the mean of its divisors is an integer number (4003920).

Almost surely, 2^42207231 is an apocalyptic number.

42207231 is a deficient number, since it is larger than the sum of its proper divisors (21855489).

42207231 is a wasteful number, since it uses less digits than its factorization.

42207231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55646.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 42207231 is about 6496.7092439173. The cubic root of 42207231 is about 348.1734255818.

Adding to 42207231 its reverse (13270224), we get a palindrome (55477455).

The spelling of 42207231 in words is "forty-two million, two hundred seven thousand, two hundred thirty-one".