265505501 has 2 divisors, whose sum is σ = 265505502. Its totient is φ = 265505500.

The previous prime is 265505497. The next prime is 265505519. The reversal of 265505501 is 105505562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 253637476 + 11868025 = 15926^2 + 3445^2 .

It is a cyclic number.

It is not a de Polignac number, because 265505501 - 2² = 265505497 is a prime.

It is a super-2 number, since 2×265505501² = 140986342122522002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265505531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132752750 + 132752751.

It is an arithmetic number, because the mean of its divisors is an integer number (132752751).

Almost surely, 2^265505501 is an apocalyptic number.

It is an amenable number.

265505501 is a deficient number, since it is larger than the sum of its proper divisors (1).

265505501 is an equidigital number, since it uses as much as digits as its factorization.

265505501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 265505501 is about 16294.3395386251. The cubic root of 265505501 is about 642.7239861610.

The spelling of 265505501 in words is "two hundred sixty-five million, five hundred five thousand, five hundred one".