265980551 has 2 divisors, whose sum is σ = 265980552. Its totient is φ = 265980550.

The previous prime is 265980529. The next prime is 265980569. The reversal of 265980551 is 155089562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265980551 - 2¹⁸ = 265718407 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 265980499 and 265980508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265980511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132990275 + 132990276.

It is an arithmetic number, because the mean of its divisors is an integer number (132990276).

Almost surely, 2^265980551 is an apocalyptic number.

265980551 is a deficient number, since it is larger than the sum of its proper divisors (1).

265980551 is an equidigital number, since it uses as much as digits as its factorization.

265980551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108000, while the sum is 41.

The square root of 265980551 is about 16308.9101720501. The cubic root of 265980551 is about 643.1070844520.

The spelling of 265980551 in words is "two hundred sixty-five million, nine hundred eighty thousand, five hundred fifty-one".