1011255263 has 4 divisors (see below), whose sum is σ = 1015710360. Its totient is φ = 1006800168.

The previous prime is 1011255233. The next prime is 1011255281. The reversal of 1011255263 is 3625521101.

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 1011255263 - 2¹⁸ = 1010993119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011255233) 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, 2227208 + ... + 2227661.

It is an arithmetic number, because the mean of its divisors is an integer number (253927590).

Almost surely, 2^1011255263 is an apocalyptic number.

1011255263 is a deficient number, since it is larger than the sum of its proper divisors (4455097).

1011255263 is an equidigital number, since it uses as much as digits as its factorization.

1011255263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4455096.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1011255263 is about 31800.2399833712. The cubic root of 1011255263 is about 1003.7377660318.

Adding to 1011255263 its reverse (3625521101), we get a palindrome (4636776364).

The spelling of 1011255263 in words is "one billion, eleven million, two hundred fifty-five thousand, two hundred sixty-three".