251106049 has 2 divisors, whose sum is σ = 251106050. Its totient is φ = 251106048.

The previous prime is 251106029. The next prime is 251106061. The reversal of 251106049 is 940601152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172659600 + 78446449 = 13140^2 + 8857^2 .

It is a cyclic number.

It is not a de Polignac number, because 251106049 - 2¹³ = 251097857 is a prime.

It is not a weakly prime, because it can be changed into another prime (251106029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125553024 + 125553025.

It is an arithmetic number, because the mean of its divisors is an integer number (125553025).

Almost surely, 2^251106049 is an apocalyptic number.

It is an amenable number.

251106049 is a deficient number, since it is larger than the sum of its proper divisors (1).

251106049 is an equidigital number, since it uses as much as digits as its factorization.

251106049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 251106049 is about 15846.3260410734. The cubic root of 251106049 is about 630.8881811900. Note that the first 3 decimals are identical.

The spelling of 251106049 in words is "two hundred fifty-one million, one hundred six thousand, forty-nine".