5231646491 has 4 divisors (see below), whose sum is σ = 5232527184. Its totient is φ = 5230765800.

The previous prime is 5231646437. The next prime is 5231646499. The reversal of 5231646491 is 1946461325.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5231646491 is a prime.

It is a super-2 number, since 2×5231646491² = 54740250013585226162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5231646499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431375 + ... + 443336.

It is an arithmetic number, because the mean of its divisors is an integer number (1308131796).

Almost surely, 2^5231646491 is an apocalyptic number.

5231646491 is a deficient number, since it is larger than the sum of its proper divisors (880693).

5231646491 is an equidigital number, since it uses as much as digits as its factorization.

5231646491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880692.

The product of its digits is 155520, while the sum is 41.

The square root of 5231646491 is about 72330.1216022758. The cubic root of 5231646491 is about 1735.9856470734.

The spelling of 5231646491 in words is "five billion, two hundred thirty-one million, six hundred forty-six thousand, four hundred ninety-one".