265550531 has 2 divisors, whose sum is σ = 265550532. Its totient is φ = 265550530.

The previous prime is 265550497. The next prime is 265550533. The reversal of 265550531 is 135055562.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265550531 is a prime.

It is a super-2 number, since 2×265550531² = 141034169028763922, which contains 22 as substring.

Together with 265550533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (265550533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132775265 + 132775266.

It is an arithmetic number, because the mean of its divisors is an integer number (132775266).

Almost surely, 2^265550531 is an apocalyptic number.

265550531 is a deficient number, since it is larger than the sum of its proper divisors (1).

265550531 is an equidigital number, since it uses as much as digits as its factorization.

265550531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 265550531 is about 16295.7212482295. The cubic root of 265550531 is about 642.7603196518.

The spelling of 265550531 in words is "two hundred sixty-five million, five hundred fifty thousand, five hundred thirty-one".