263420351 has 4 divisors (see below), whose sum is σ = 277284600. Its totient is φ = 249556104.

The previous prime is 263420347. The next prime is 263420363. The reversal of 263420351 is 153024362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 153024362 = 2 ⋅76512181.

It is a cyclic number.

It is not a de Polignac number, because 263420351 - 2² = 263420347 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 263420351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263420371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6932096 + ... + 6932133.

It is an arithmetic number, because the mean of its divisors is an integer number (69321150).

Almost surely, 2^263420351 is an apocalyptic number.

263420351 is a deficient number, since it is larger than the sum of its proper divisors (13864249).

263420351 is a wasteful number, since it uses less digits than its factorization.

263420351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13864248.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 263420351 is about 16230.2295424310. The cubic root of 263420351 is about 641.0370158798.

The spelling of 263420351 in words is "two hundred sixty-three million, four hundred twenty thousand, three hundred fifty-one".