2011551225 has 24 divisors (see below), whose sum is σ = 3406886112. Its totient is φ = 1046659200.

The previous prime is 2011551187. The next prime is 2011551229. The reversal of 2011551225 is 5221551102.

It is not a de Polignac number, because 2011551225 - 2⁶ = 2011551161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011551195 and 2011551204.

It is not an unprimeable number, because it can be changed into a prime (2011551229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 324007 + ... + 330156.

It is an arithmetic number, because the mean of its divisors is an integer number (141953588).

Almost surely, 2^2011551225 is an apocalyptic number.

2011551225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2011551225 is a deficient number, since it is larger than the sum of its proper divisors (1395334887).

2011551225 is a wasteful number, since it uses less digits than its factorization.

2011551225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654217 (or 654212 counting only the distinct ones).

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

The square root of 2011551225 is about 44850.3202329705. The cubic root of 2011551225 is about 1262.3420002908.

The spelling of 2011551225 in words is "two billion, eleven million, five hundred fifty-one thousand, two hundred twenty-five".