42231431 has 4 divisors (see below), whose sum is σ = 46070664. Its totient is φ = 38392200.

The previous prime is 42231403. The next prime is 42231491. The reversal of 42231431 is 13413224.

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

It is not a de Polignac number, because 42231431 - 2⁶ = 42231367 is a prime.

It is a super-2 number, since 2×42231431² = 3566987528615522, 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 (42231491) 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 3 ways as a sum of consecutive naturals, for example, 1919600 + ... + 1919621.

It is an arithmetic number, because the mean of its divisors is an integer number (11517666).

Almost surely, 2^42231431 is an apocalyptic number.

42231431 is a deficient number, since it is larger than the sum of its proper divisors (3839233).

42231431 is a wasteful number, since it uses less digits than its factorization.

42231431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3839232.

The product of its digits is 576, while the sum is 20.

The square root of 42231431 is about 6498.5714584053. The cubic root of 42231431 is about 348.2399559438.

Adding to 42231431 its reverse (13413224), we get a palindrome (55644655).

It can be divided in two parts, 42231 and 431, that multiplied together give a triangular number (18201561 = T₆₀₃₃).

The spelling of 42231431 in words is "forty-two million, two hundred thirty-one thousand, four hundred thirty-one".