2001725051 has 4 divisors (see below), whose sum is σ = 2001814704. Its totient is φ = 2001635400.

The previous prime is 2001725023. The next prime is 2001725057. The reversal of 2001725051 is 1505271002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2001725051 - 2⁶ = 2001724987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001725057) 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, 18266 + ... + 65856.

It is an arithmetic number, because the mean of its divisors is an integer number (500453676).

Almost surely, 2^2001725051 is an apocalyptic number.

2001725051 is a deficient number, since it is larger than the sum of its proper divisors (89653).

2001725051 is an equidigital number, since it uses as much as digits as its factorization.

2001725051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89652.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 2001725051 is about 44740.6420494834. The cubic root of 2001725051 is about 1260.2831838094.

Adding to 2001725051 its reverse (1505271002), we get a palindrome (3506996053).

The spelling of 2001725051 in words is "two billion, one million, seven hundred twenty-five thousand, fifty-one".