6531225479 has 2 divisors, whose sum is σ = 6531225480. Its totient is φ = 6531225478.

The previous prime is 6531225451. The next prime is 6531225487. The reversal of 6531225479 is 9745221356.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6531225479 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6531225419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3265612739 + 3265612740.

It is an arithmetic number, because the mean of its divisors is an integer number (3265612740).

Almost surely, 2^6531225479 is an apocalyptic number.

6531225479 is a deficient number, since it is larger than the sum of its proper divisors (1).

6531225479 is an equidigital number, since it uses as much as digits as its factorization.

6531225479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 44.

The square root of 6531225479 is about 80815.9976675410. The cubic root of 6531225479 is about 1869.2392531225.

The spelling of 6531225479 in words is "six billion, five hundred thirty-one million, two hundred twenty-five thousand, four hundred seventy-nine".