263638051 has 2 divisors, whose sum is σ = 263638052. Its totient is φ = 263638050.

The previous prime is 263638021. The next prime is 263638069. The reversal of 263638051 is 150836362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263638051 - 2⁷ = 263637923 is a prime.

It is equal to p_14383636 and since 263638051 and 14383636 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 263637998 and 263638016.

It is not a weakly prime, because it can be changed into another prime (263638021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131819025 + 131819026.

It is an arithmetic number, because the mean of its divisors is an integer number (131819026).

Almost surely, 2^263638051 is an apocalyptic number.

263638051 is a deficient number, since it is larger than the sum of its proper divisors (1).

263638051 is an equidigital number, since it uses as much as digits as its factorization.

263638051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 263638051 is about 16236.9347784611. The cubic root of 263638051 is about 641.2135592276.

The spelling of 263638051 in words is "two hundred sixty-three million, six hundred thirty-eight thousand, fifty-one".