250947346981 has 2 divisors, whose sum is σ = 250947346982. Its totient is φ = 250947346980.

The previous prime is 250947346967. The next prime is 250947347009. The reversal of 250947346981 is 189643749052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193234972225 + 57712374756 = 439585^2 + 240234^2 .

It is a cyclic number.

It is not a de Polignac number, because 250947346981 - 2¹⁵ = 250947314213 is a prime.

It is a super-2 number, since 2×250947346981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250947346781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125473673490 + 125473673491.

It is an arithmetic number, because the mean of its divisors is an integer number (125473673491).

It is a 1-persistent number, because it is pandigital, but 2⋅250947346981 = 501894693962 is not.

Almost surely, 2^250947346981 is an apocalyptic number.

It is an amenable number.

250947346981 is a deficient number, since it is larger than the sum of its proper divisors (1).

250947346981 is an equidigital number, since it uses as much as digits as its factorization.

250947346981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 250947346981 in words is "two hundred fifty billion, nine hundred forty-seven million, three hundred forty-six thousand, nine hundred eighty-one".