1431461221 has 2 divisors, whose sum is σ = 1431461222. Its totient is φ = 1431461220.

The previous prime is 1431461219. The next prime is 1431461233. The reversal of 1431461221 is 1221641341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999444996 + 432016225 = 31614^2 + 20785^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431461221 - 2¹ = 1431461219 is a prime.

Together with 1431461219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1431461021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715730610 + 715730611.

It is an arithmetic number, because the mean of its divisors is an integer number (715730611).

Almost surely, 2^1431461221 is an apocalyptic number.

It is an amenable number.

1431461221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431461221 is an equidigital number, since it uses as much as digits as its factorization.

1431461221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

The square root of 1431461221 is about 37834.6563483799. The cubic root of 1431461221 is about 1127.0067808977.

The spelling of 1431461221 in words is "one billion, four hundred thirty-one million, four hundred sixty-one thousand, two hundred twenty-one".