251008049 has 2 divisors, whose sum is σ = 251008050. Its totient is φ = 251008048.

The previous prime is 251008033. The next prime is 251008057. The reversal of 251008049 is 940800152.

251008049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160149025 + 90859024 = 12655^2 + 9532^2 .

It is a cyclic number.

It is not a de Polignac number, because 251008049 - 2⁴ = 251008033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (251008649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125504024 + 125504025.

It is an arithmetic number, because the mean of its divisors is an integer number (125504025).

Almost surely, 2^251008049 is an apocalyptic number.

It is an amenable number.

251008049 is a deficient number, since it is larger than the sum of its proper divisors (1).

251008049 is an equidigital number, since it uses as much as digits as its factorization.

251008049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 251008049 is about 15843.2335399059. The cubic root of 251008049 is about 630.8060975619.

The spelling of 251008049 in words is "two hundred fifty-one million, eight thousand, forty-nine".