2531136947 has 2 divisors, whose sum is σ = 2531136948. Its totient is φ = 2531136946.

The previous prime is 2531136931. The next prime is 2531136973. The reversal of 2531136947 is 7496311352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2531136947 - 2⁴ = 2531136931 is a prime.

It is not a weakly prime, because it can be changed into another prime (2531136997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265568473 + 1265568474.

It is an arithmetic number, because the mean of its divisors is an integer number (1265568474).

Almost surely, 2^2531136947 is an apocalyptic number.

2531136947 is a deficient number, since it is larger than the sum of its proper divisors (1).

2531136947 is an equidigital number, since it uses as much as digits as its factorization.

2531136947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 41.

The square root of 2531136947 is about 50310.4059514530. The cubic root of 2531136947 is about 1362.8201548470.

The spelling of 2531136947 in words is "two billion, five hundred thirty-one million, one hundred thirty-six thousand, nine hundred forty-seven".