1431213509 has 4 divisors (see below), whose sum is σ = 1561323840. Its totient is φ = 1301103180.

The previous prime is 1431213467. The next prime is 1431213529. The reversal of 1431213509 is 9053121341.

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 1431213509 - 2²⁴ = 1414436293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431213529) 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, 65055149 + ... + 65055170.

It is an arithmetic number, because the mean of its divisors is an integer number (390330960).

Almost surely, 2^1431213509 is an apocalyptic number.

It is an amenable number.

1431213509 is a deficient number, since it is larger than the sum of its proper divisors (130110331).

1431213509 is a wasteful number, since it uses less digits than its factorization.

1431213509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130110330.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1431213509 is about 37831.3825943488. The cubic root of 1431213509 is about 1126.9417682601.

The spelling of 1431213509 in words is "one billion, four hundred thirty-one million, two hundred thirteen thousand, five hundred nine".