1431442221 has 12 divisors (see below), whose sum is σ = 2097871776. Its totient is φ = 867540520.

The previous prime is 1431442219. The next prime is 1431442241. The reversal of 1431442221 is 1222441341.

It is not a de Polignac number, because 1431442221 - 2¹ = 1431442219 is a prime.

It is a super-2 number, since 2×1431442221² = 4098053664122825682, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1431442191 and 1431442200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431442241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1971321 + ... + 1972046.

It is an arithmetic number, because the mean of its divisors is an integer number (174822648).

Almost surely, 2^1431442221 is an apocalyptic number.

1431442221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1431442221 is a deficient number, since it is larger than the sum of its proper divisors (666429555).

1431442221 is a wasteful number, since it uses less digits than its factorization.

1431442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3943392 (or 3943381 counting only the distinct ones).

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

The square root of 1431442221 is about 37834.4052550057. The cubic root of 1431442221 is about 1127.0017945655.

Adding to 1431442221 its reverse (1222441341), we get a palindrome (2653883562).

The spelling of 1431442221 in words is "one billion, four hundred thirty-one million, four hundred forty-two thousand, two hundred twenty-one".