263055961 has 15 divisors (see below), whose sum is σ = 307810293. Its totient is φ = 224795340.

The previous prime is 263055917. The next prime is 263055979. The reversal of 263055961 is 169550362.

The square root of 263055961 is 16219.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 263055961 - 2⁷ = 263055833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 263055961.

It is not an unprimeable number, because it can be changed into a prime (263055901) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 794566 + ... + 794896.

Almost surely, 2^263055961 is an apocalyptic number.

263055961 is the 16219-th square number.

263055961 is the 8110-th centered octagonal number.

It is an amenable number.

263055961 is a deficient number, since it is larger than the sum of its proper divisors (44754332).

263055961 is an frugal number, since it uses more digits than its factorization.

263055961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 37.

The cubic root of 263055961 is about 640.7412968037.

The spelling of 263055961 in words is "two hundred sixty-three million, fifty-five thousand, nine hundred sixty-one".