1430320221 has 32 divisors (see below), whose sum is σ = 2346163200. Its totient is φ = 853910640.

The previous prime is 1430320217. The next prime is 1430320249. The reversal of 1430320221 is 1220230341.

It is not a de Polignac number, because 1430320221 - 2² = 1430320217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1430320194 and 1430320203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1430320321) 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, 16041 + ... + 55838.

It is an arithmetic number, because the mean of its divisors is an integer number (73317600).

Almost surely, 2^1430320221 is an apocalyptic number.

1430320221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1430320221 is a deficient number, since it is larger than the sum of its proper divisors (915842979).

1430320221 is a wasteful number, since it uses less digits than its factorization.

1430320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71966 (or 71960 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1430320221 is about 37819.5745745507. The cubic root of 1430320221 is about 1126.7072602560.

Adding to 1430320221 its reverse (1220230341), we get a palindrome (2650550562).

The spelling of 1430320221 in words is "one billion, four hundred thirty million, three hundred twenty thousand, two hundred twenty-one".