2163561431 has 8 divisors (see below), whose sum is σ = 2241237600. Its totient is φ = 2087071360.

The previous prime is 2163561427. The next prime is 2163561461. The reversal of 2163561431 is 1341653612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2163561431 - 2² = 2163561427 is a prime.

It is a super-2 number, since 2×2163561431² = 9361996131421535522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163561461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292811 + ... + 300108.

It is an arithmetic number, because the mean of its divisors is an integer number (280154700).

Almost surely, 2^2163561431 is an apocalyptic number.

2163561431 is a deficient number, since it is larger than the sum of its proper divisors (77676169).

2163561431 is an equidigital number, since it uses as much as digits as its factorization.

2163561431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593049.

The product of its digits is 12960, while the sum is 32.

The square root of 2163561431 is about 46514.0992710812. The cubic root of 2163561431 is about 1293.3708748816.

The spelling of 2163561431 in words is "two billion, one hundred sixty-three million, five hundred sixty-one thousand, four hundred thirty-one".