2051529512181 has 8 divisors (see below), whose sum is σ = 2735381461824. Its totient is φ = 1367681952000.

The previous prime is 2051529512171. The next prime is 2051529512189. The reversal of 2051529512181 is 1812159251502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2051529512181 - 2³⁰ = 2050455770357 is a prime.

It is a super-2 number, since 2×2051529512181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051529512189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218640 + ... + 2037366.

It is an arithmetic number, because the mean of its divisors is an integer number (341922682728).

Almost surely, 2^{2051529512181} is an apocalyptic number.

It is an amenable number.

2051529512181 is a deficient number, since it is larger than the sum of its proper divisors (683851949643).

2051529512181 is a wasteful number, since it uses less digits than its factorization.

2051529512181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194731.

The product of its (nonzero) digits is 72000, while the sum is 42.

The spelling of 2051529512181 in words is "two trillion, fifty-one billion, five hundred twenty-nine million, five hundred twelve thousand, one hundred eighty-one".