1442431221 has 32 divisors (see below), whose sum is σ = 2400608256. Its totient is φ = 748440000.

The previous prime is 1442431219. The next prime is 1442431253. The reversal of 1442431221 is 1221342441.

It is not a de Polignac number, because 1442431221 - 2¹ = 1442431219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1442431191 and 1442431200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442431201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225771 + ... + 232071.

It is an arithmetic number, because the mean of its divisors is an integer number (75019008).

Almost surely, 2^1442431221 is an apocalyptic number.

1442431221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1442431221 is a deficient number, since it is larger than the sum of its proper divisors (958177035).

1442431221 is a wasteful number, since it uses less digits than its factorization.

1442431221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7313.

The product of its digits is 1536, while the sum is 24.

The square root of 1442431221 is about 37979.3525616222. The cubic root of 1442431221 is about 1129.8783958211.

Adding to 1442431221 its reverse (1221342441), we get a palindrome (2663773662).

The spelling of 1442431221 in words is "one billion, four hundred forty-two million, four hundred thirty-one thousand, two hundred twenty-one".