2001013225 has 24 divisors (see below), whose sum is σ = 2601565632. Its totient is φ = 1523860800.

The previous prime is 2001013211. The next prime is 2001013229. The reversal of 2001013225 is 5223101002.

It is not a de Polignac number, because 2001013225 - 2¹³ = 2001005033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001013199 and 2001013208.

It is not an unprimeable number, because it can be changed into a prime (2001013229) 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, 113079 + ... + 129571.

It is an arithmetic number, because the mean of its divisors is an integer number (108398568).

Almost surely, 2^2001013225 is an apocalyptic number.

2001013225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2001013225 is a deficient number, since it is larger than the sum of its proper divisors (600552407).

2001013225 is a wasteful number, since it uses less digits than its factorization.

2001013225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16737 (or 16732 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 2001013225 is about 44732.6863154897. The cubic root of 2001013225 is about 1260.1337778930.

Adding to 2001013225 its reverse (5223101002), we get a palindrome (7224114227).

The spelling of 2001013225 in words is "two billion, one million, thirteen thousand, two hundred twenty-five".