42073231 has 4 divisors (see below), whose sum is σ = 43430464. Its totient is φ = 40716000.

The previous prime is 42073223. The next prime is 42073243. The reversal of 42073231 is 13237024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42073231 - 2³ = 42073223 is a prime.

It is a super-2 number, since 2×42073231² = 3540313533558722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42073211) 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, 678570 + ... + 678631.

It is an arithmetic number, because the mean of its divisors is an integer number (10857616).

Almost surely, 2^42073231 is an apocalyptic number.

42073231 is a deficient number, since it is larger than the sum of its proper divisors (1357233).

42073231 is a wasteful number, since it uses less digits than its factorization.

42073231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357232.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 42073231 is about 6486.3881320809. The cubic root of 42073231 is about 347.8045733018.

The spelling of 42073231 in words is "forty-two million, seventy-three thousand, two hundred thirty-one".