2251105521 has 12 divisors (see below), whose sum is σ = 3491510832. Its totient is φ = 1286345928.

The previous prime is 2251105511. The next prime is 2251105523. The reversal of 2251105521 is 1255011522.

It is not a de Polignac number, because 2251105521 - 2⁵ = 2251105489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2251105491 and 2251105500.

It is not an unprimeable number, because it can be changed into a prime (2251105523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7656675 + ... + 7656968.

It is an arithmetic number, because the mean of its divisors is an integer number (290959236).

Almost surely, 2^2251105521 is an apocalyptic number.

2251105521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2251105521 is a deficient number, since it is larger than the sum of its proper divisors (1240405311).

2251105521 is a wasteful number, since it uses less digits than its factorization.

2251105521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15313660 (or 15313653 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 2251105521 is about 47445.8166859840. The cubic root of 2251105521 is about 1310.5852756420.

The spelling of 2251105521 in words is "two billion, two hundred fifty-one million, one hundred five thousand, five hundred twenty-one".