42353431 has 4 divisors (see below), whose sum is σ = 42613432. Its totient is φ = 42093432.

The previous prime is 42353411. The next prime is 42353449. The reversal of 42353431 is 13435324.

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 42353431 - 2⁷ = 42353303 is a prime.

It is a super-2 number, since 2×42353431² = 3587626234943522, 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 = 42353396 and 42353405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42353411) 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, 129756 + ... + 130081.

It is an arithmetic number, because the mean of its divisors is an integer number (10653358).

Almost surely, 2^42353431 is an apocalyptic number.

42353431 is a deficient number, since it is larger than the sum of its proper divisors (260001).

42353431 is a wasteful number, since it uses less digits than its factorization.

42353431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260000.

The product of its digits is 4320, while the sum is 25.

The square root of 42353431 is about 6507.9513673659. The cubic root of 42353431 is about 348.5749704740.

Adding to 42353431 its reverse (13435324), we get a palindrome (55788755).

The spelling of 42353431 in words is "forty-two million, three hundred fifty-three thousand, four hundred thirty-one".