42423553 has 4 divisors (see below), whose sum is σ = 42960640. Its totient is φ = 41886468.

The previous prime is 42423539. The next prime is 42423559. The reversal of 42423553 is 35532424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42423553 - 2²¹ = 40326401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42423559) 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, 268425 + ... + 268582.

It is an arithmetic number, because the mean of its divisors is an integer number (10740160).

Almost surely, 2^42423553 is an apocalyptic number.

It is an amenable number.

42423553 is a deficient number, since it is larger than the sum of its proper divisors (537087).

42423553 is an equidigital number, since it uses as much as digits as its factorization.

42423553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537086.

The product of its digits is 14400, while the sum is 28.

The square root of 42423553 is about 6513.3365489586. The cubic root of 42423553 is about 348.7672358657.

Adding to 42423553 its reverse (35532424), we get a palindrome (77955977).

The spelling of 42423553 in words is "forty-two million, four hundred twenty-three thousand, five hundred fifty-three".