2541750781 has 2 divisors, whose sum is σ = 2541750782. Its totient is φ = 2541750780.

The previous prime is 2541750763. The next prime is 2541750787. The reversal of 2541750781 is 1870571452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2429602681 + 112148100 = 49291^2 + 10590^2 .

It is a cyclic number.

It is not a de Polignac number, because 2541750781 - 2²⁵ = 2508196349 is a prime.

It is a super-2 number, since 2×2541750781² = 12920994065428219922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2541750787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270875390 + 1270875391.

It is an arithmetic number, because the mean of its divisors is an integer number (1270875391).

Almost surely, 2^2541750781 is an apocalyptic number.

It is an amenable number.

2541750781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2541750781 is an equidigital number, since it uses as much as digits as its factorization.

2541750781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78400, while the sum is 40.

The square root of 2541750781 is about 50415.7790875039. The cubic root of 2541750781 is about 1364.7224061269.

The spelling of 2541750781 in words is "two billion, five hundred forty-one million, seven hundred fifty thousand, seven hundred eighty-one".