42225431 has 4 divisors (see below), whose sum is σ = 42321192. Its totient is φ = 42129672.

The previous prime is 42225413. The next prime is 42225457. The reversal of 42225431 is 13452224.

It is a happy number.

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 42225431 - 2¹⁴ = 42209047 is a prime.

It is a super-2 number, since 2×42225431² = 3565974046271522, 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 = 42225397 and 42225406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42225461) 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, 47216 + ... + 48101.

It is an arithmetic number, because the mean of its divisors is an integer number (10580298).

Almost surely, 2^42225431 is an apocalyptic number.

42225431 is a deficient number, since it is larger than the sum of its proper divisors (95761).

42225431 is an equidigital number, since it uses as much as digits as its factorization.

42225431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95760.

The product of its digits is 1920, while the sum is 23.

The square root of 42225431 is about 6498.1098020886. The cubic root of 42225431 is about 348.2234631828.

Adding to 42225431 its reverse (13452224), we get a palindrome (55677655).

The spelling of 42225431 in words is "forty-two million, two hundred twenty-five thousand, four hundred thirty-one".