1431209445 has 32 divisors (see below), whose sum is σ = 2350373760. Its totient is φ = 743424000.

The previous prime is 1431209407. The next prime is 1431209459. The reversal of 1431209445 is 5449021341.

It is a de Polignac number, because none of the positive numbers 2^k-1431209445 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81445 + ... + 97445.

It is an arithmetic number, because the mean of its divisors is an integer number (73449180).

Almost surely, 2^1431209445 is an apocalyptic number.

1431209445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1431209445 is a deficient number, since it is larger than the sum of its proper divisors (919164315).

1431209445 is a wasteful number, since it uses less digits than its factorization.

1431209445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16165.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1431209445 is about 37831.3288822901. The cubic root of 1431209445 is about 1126.9407015906.

The spelling of 1431209445 in words is "one billion, four hundred thirty-one million, two hundred nine thousand, four hundred forty-five".