1431546561 has 16 divisors (see below), whose sum is σ = 2123598400. Its totient is φ = 953109504.

The previous prime is 1431546553. The next prime is 1431546569. The reversal of 1431546561 is 1656451341.

1431546561 is a `hidden beast` number, since 1 + 43 + 1 + 54 + 6 + 561 = 666.

It is an interprime number because it is at equal distance from previous prime (1431546553) and next prime (1431546569).

It is not a de Polignac number, because 1431546561 - 2³ = 1431546553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1431546569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13711 + ... + 55236.

It is an arithmetic number, because the mean of its divisors is an integer number (132724900).

Almost surely, 2^1431546561 is an apocalyptic number.

It is an amenable number.

1431546561 is a deficient number, since it is larger than the sum of its proper divisors (692051839).

1431546561 is an equidigital number, since it uses as much as digits as its factorization.

1431546561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69725 (or 69719 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 1431546561 is about 37835.7841335422. The cubic root of 1431546561 is about 1127.0291768584.

The spelling of 1431546561 in words is "one billion, four hundred thirty-one million, five hundred forty-six thousand, five hundred sixty-one".