42201331 has 4 divisors (see below), whose sum is σ = 42214392. Its totient is φ = 42188272.

The previous prime is 42201317. The next prime is 42201353. The reversal of 42201331 is 13310224.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42201331 - 2⁹ = 42200819 is a prime.

It is a super-2 number, since 2×42201331² = 3561904676343122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42201311) 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, 2271 + ... + 9463.

It is an arithmetic number, because the mean of its divisors is an integer number (10553598).

Almost surely, 2^42201331 is an apocalyptic number.

42201331 is a deficient number, since it is larger than the sum of its proper divisors (13061).

42201331 is an equidigital number, since it uses as much as digits as its factorization.

42201331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13060.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 42201331 is about 6496.2551520087. The cubic root of 42201331 is about 348.1572015140.

Adding to 42201331 its reverse (13310224), we get a palindrome (55511555).

The spelling of 42201331 in words is "forty-two million, two hundred one thousand, three hundred thirty-one".