42173131 has 16 divisors (see below), whose sum is σ = 56625408. Its totient is φ = 30333600.

The previous prime is 42173129. The next prime is 42173137. The reversal of 42173131 is 13137124.

It is not a de Polignac number, because 42173131 - 2¹ = 42173129 is a prime.

It is a super-2 number, since 2×42173131² = 3557145956686322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42173137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20065 + ... + 22066.

It is an arithmetic number, because the mean of its divisors is an integer number (3539088).

Almost surely, 2^42173131 is an apocalyptic number.

42173131 is a deficient number, since it is larger than the sum of its proper divisors (14452277).

42173131 is a wasteful number, since it uses less digits than its factorization.

42173131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42162.

The product of its digits is 504, while the sum is 22.

The square root of 42173131 is about 6494.0843080453. The cubic root of 42173131 is about 348.0796350759.

The spelling of 42173131 in words is "forty-two million, one hundred seventy-three thousand, one hundred thirty-one".