265154452232521 has 2 divisors, whose sum is σ = 265154452232522. Its totient is φ = 265154452232520.

The previous prime is 265154452232507. The next prime is 265154452232569. The reversal of 265154452232521 is 125232254451562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264862247118921 + 292205113600 = 16274589^2 + 540560^2 .

It is a cyclic number.

It is not a de Polignac number, because 265154452232521 - 2¹⁵ = 265154452199753 is a prime.

It is not a weakly prime, because it can be changed into another prime (265154452232591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132577226116260 + 132577226116261.

It is an arithmetic number, because the mean of its divisors is an integer number (132577226116261).

Almost surely, 2^{265154452232521} is an apocalyptic number.

It is an amenable number.

265154452232521 is a deficient number, since it is larger than the sum of its proper divisors (1).

265154452232521 is an equidigital number, since it uses as much as digits as its factorization.

265154452232521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760000, while the sum is 49.

The spelling of 265154452232521 in words is "two hundred sixty-five trillion, one hundred fifty-four billion, four hundred fifty-two million, two hundred thirty-two thousand, five hundred twenty-one".