6531422161 has 4 divisors (see below), whose sum is σ = 7125187824. Its totient is φ = 5937656500.

The previous prime is 6531422123. The next prime is 6531422179. The reversal of 6531422161 is 1612241356.

It is a happy number.

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 6531422161 - 2⁹ = 6531421649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6531422111) 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 3 ways as a sum of consecutive naturals, for example, 296882815 + ... + 296882836.

It is an arithmetic number, because the mean of its divisors is an integer number (1781296956).

Almost surely, 2^6531422161 is an apocalyptic number.

It is an amenable number.

6531422161 is a deficient number, since it is larger than the sum of its proper divisors (593765663).

6531422161 is a wasteful number, since it uses less digits than its factorization.

6531422161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593765662.

The product of its digits is 8640, while the sum is 31.

The square root of 6531422161 is about 80817.2145090389. The cubic root of 6531422161 is about 1869.2580164223.

The spelling of 6531422161 in words is "six billion, five hundred thirty-one million, four hundred twenty-two thousand, one hundred sixty-one".