42300031 has 4 divisors (see below), whose sum is σ = 42623064. Its totient is φ = 41977000.

The previous prime is 42300019. The next prime is 42300091. The reversal of 42300031 is 13000324.

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 42300031 - 2¹³ = 42291839 is a prime.

It is a super-2 number, since 2×42300031² = 3578585245201922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42299984 and 42300020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42300001) 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, 161320 + ... + 161581.

It is an arithmetic number, because the mean of its divisors is an integer number (10655766).

Almost surely, 2^42300031 is an apocalyptic number.

42300031 is a deficient number, since it is larger than the sum of its proper divisors (323033).

42300031 is a wasteful number, since it uses less digits than its factorization.

42300031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323032.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 42300031 is about 6503.8473998088. The cubic root of 42300031 is about 348.4284122426.

Adding to 42300031 its reverse (13000324), we get a palindrome (55300355).

The spelling of 42300031 in words is "forty-two million, three hundred thousand, thirty-one".