2251121263 has 4 divisors (see below), whose sum is σ = 2267316520. Its totient is φ = 2234926008.

The previous prime is 2251121261. The next prime is 2251121267. The reversal of 2251121263 is 3621211522.

2251121263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2251121263 - 2¹ = 2251121261 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 (2251121261) 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, 8097420 + ... + 8097697.

It is an arithmetic number, because the mean of its divisors is an integer number (566829130).

Almost surely, 2^2251121263 is an apocalyptic number.

2251121263 is a deficient number, since it is larger than the sum of its proper divisors (16195257).

2251121263 is a wasteful number, since it uses less digits than its factorization.

2251121263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16195256.

The product of its digits is 1440, while the sum is 25.

The square root of 2251121263 is about 47445.9825801932. The cubic root of 2251121263 is about 1310.5883306128.

Adding to 2251121263 its reverse (3621211522), we get a palindrome (5872332785).

The spelling of 2251121263 in words is "two billion, two hundred fifty-one million, one hundred twenty-one thousand, two hundred sixty-three".