263290251 has 8 divisors (see below), whose sum is σ = 401204224. Its totient is φ = 150451560.

The previous prime is 263290211. The next prime is 263290259. The reversal of 263290251 is 152092362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 263290251 - 2⁷ = 263290123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263290259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6268795 + ... + 6268836.

It is an arithmetic number, because the mean of its divisors is an integer number (50150528).

Almost surely, 2^263290251 is an apocalyptic number.

263290251 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

263290251 is a deficient number, since it is larger than the sum of its proper divisors (137913973).

263290251 is a wasteful number, since it uses less digits than its factorization.

263290251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12537641.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 263290251 is about 16226.2210942659. The cubic root of 263290251 is about 640.9314651265.

The spelling of 263290251 in words is "two hundred sixty-three million, two hundred ninety thousand, two hundred fifty-one".