2497053781 has 2 divisors, whose sum is σ = 2497053782. Its totient is φ = 2497053780.

The previous prime is 2497053703. The next prime is 2497053803. The reversal of 2497053781 is 1873507942.

2497053781 = 35334² + 35335².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1248562225 + 1248491556 = 35335^2 + 35334^2 .

It is a cyclic number.

It is not a de Polignac number, because 2497053781 - 2⁹ = 2497053269 is a prime.

It is a super-2 number, since 2×2497053781² = 12470555170412791922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2494053781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1248526890 + 1248526891.

It is an arithmetic number, because the mean of its divisors is an integer number (1248526891).

Almost surely, 2^2497053781 is an apocalyptic number.

2497053781 is the 35335-th centered square number and also the 22348-th centered decagonal number.

It is an amenable number.

2497053781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2497053781 is an equidigital number, since it uses as much as digits as its factorization.

2497053781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 2497053781 is about 49970.5291246751. The cubic root of 2497053781 is about 1356.6754474724.

The spelling of 2497053781 in words is "two billion, four hundred ninety-seven million, fifty-three thousand, seven hundred eighty-one".