1431233221 has 4 divisors (see below), whose sum is σ = 1561345344. Its totient is φ = 1301121100.

The previous prime is 1431233183. The next prime is 1431233261. The reversal of 1431233221 is 1223321341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1431233221 - 2⁷ = 1431233093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1431233192 and 1431233201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431233261) 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, 65056045 + ... + 65056066.

It is an arithmetic number, because the mean of its divisors is an integer number (390336336).

Almost surely, 2^1431233221 is an apocalyptic number.

1431233221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1431233221 is a deficient number, since it is larger than the sum of its proper divisors (130112123).

1431233221 is a wasteful number, since it uses less digits than its factorization.

1431233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130112122.

The product of its digits is 864, while the sum is 22.

The square root of 1431233221 is about 37831.6431178980. The cubic root of 1431233221 is about 1126.9469419988.

Adding to 1431233221 its reverse (1223321341), we get a palindrome (2654554562).

The spelling of 1431233221 in words is "one billion, four hundred thirty-one million, two hundred thirty-three thousand, two hundred twenty-one".