42031923 has 4 divisors (see below), whose sum is σ = 56042568. Its totient is φ = 28021280.

The previous prime is 42031921. The next prime is 42031937. The reversal of 42031923 is 32913024.

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 42031923 - 2¹ = 42031921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42031893 and 42031902.

It is not an unprimeable number, because it can be changed into a prime (42031921) 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, 7005318 + ... + 7005323.

It is an arithmetic number, because the mean of its divisors is an integer number (14010642).

Almost surely, 2^42031923 is an apocalyptic number.

42031923 is a deficient number, since it is larger than the sum of its proper divisors (14010645).

42031923 is a wasteful number, since it uses less digits than its factorization.

42031923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14010644.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 42031923 is about 6483.2031435086. The cubic root of 42031923 is about 347.6907098034.

Adding to 42031923 its reverse (32913024), we get a palindrome (74944947).

The spelling of 42031923 in words is "forty-two million, thirty-one thousand, nine hundred twenty-three".