263540051 has 4 divisors (see below), whose sum is σ = 277410600. Its totient is φ = 249669504.

The previous prime is 263540029. The next prime is 263540059. The reversal of 263540051 is 150045362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 263540051 - 2⁶ = 263539987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 263540051.

It is not an unprimeable number, because it can be changed into a prime (263540059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6935246 + ... + 6935283.

It is an arithmetic number, because the mean of its divisors is an integer number (69352650).

Almost surely, 2^263540051 is an apocalyptic number.

263540051 is a deficient number, since it is larger than the sum of its proper divisors (13870549).

263540051 is a wasteful number, since it uses less digits than its factorization.

263540051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13870548.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 263540051 is about 16233.9166869859. The cubic root of 263540051 is about 641.1340983703.

The spelling of 263540051 in words is "two hundred sixty-three million, five hundred forty thousand, fifty-one".