42322531 has 4 divisors (see below), whose sum is σ = 42399072. Its totient is φ = 42245992.

The previous prime is 42322477. The next prime is 42322559. The reversal of 42322531 is 13522324.

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 42322531 - 2⁷ = 42322403 is a prime.

It is a super-2 number, since 2×42322531² = 3582393260491922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42322331) 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, 37435 + ... + 38548.

It is an arithmetic number, because the mean of its divisors is an integer number (10599768).

Almost surely, 2^42322531 is an apocalyptic number.

42322531 is a deficient number, since it is larger than the sum of its proper divisors (76541).

42322531 is an equidigital number, since it uses as much as digits as its factorization.

42322531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76540.

The product of its digits is 1440, while the sum is 22.

The square root of 42322531 is about 6505.5769152320. The cubic root of 42322531 is about 348.4901793343.

Adding to 42322531 its reverse (13522324), we get a palindrome (55844855).

The spelling of 42322531 in words is "forty-two million, three hundred twenty-two thousand, five hundred thirty-one".