2543670251 has 2 divisors, whose sum is σ = 2543670252. Its totient is φ = 2543670250.

The previous prime is 2543670247. The next prime is 2543670307. The reversal of 2543670251 is 1520763452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2543670251 - 2² = 2543670247 is a prime.

It is not a weakly prime, because it can be changed into another prime (2543676251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271835125 + 1271835126.

It is an arithmetic number, because the mean of its divisors is an integer number (1271835126).

Almost surely, 2^2543670251 is an apocalyptic number.

2543670251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543670251 is an equidigital number, since it uses as much as digits as its factorization.

2543670251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 2543670251 is about 50434.8118961497. The cubic root of 2543670251 is about 1365.0658550345.

The spelling of 2543670251 in words is "two billion, five hundred forty-three million, six hundred seventy thousand, two hundred fifty-one".