265151203721 has 2 divisors, whose sum is σ = 265151203722. Its totient is φ = 265151203720.

The previous prime is 265151203703. The next prime is 265151203831. The reversal of 265151203721 is 127302151562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251477175625 + 13674028096 = 501475^2 + 116936^2 .

It is a cyclic number.

It is not a de Polignac number, because 265151203721 - 2⁶ = 265151203657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (265151203321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132575601860 + 132575601861.

It is an arithmetic number, because the mean of its divisors is an integer number (132575601861).

Almost surely, 2^265151203721 is an apocalyptic number.

It is an amenable number.

265151203721 is a deficient number, since it is larger than the sum of its proper divisors (1).

265151203721 is an equidigital number, since it uses as much as digits as its factorization.

265151203721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 265151203721 in words is "two hundred sixty-five billion, one hundred fifty-one million, two hundred three thousand, seven hundred twenty-one".