2051511210205 has 8 divisors (see below), whose sum is σ = 2478116853504. Its totient is φ = 1630340034000.

The previous prime is 2051511210181. The next prime is 2051511210209. The reversal of 2051511210205 is 5020121151502.

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 2051511210205 - 2¹⁵ = 2051511177437 is a prime.

It is a super-2 number, since 2×2051511210205² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2051511210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051511210209) 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, 1358615941 + ... + 1358617450.

It is an arithmetic number, because the mean of its divisors is an integer number (309764606688).

Almost surely, 2^{2051511210205} is an apocalyptic number.

It is an amenable number.

2051511210205 is a deficient number, since it is larger than the sum of its proper divisors (426605643299).

2051511210205 is a wasteful number, since it uses less digits than its factorization.

2051511210205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717233547.

The product of its (nonzero) digits is 1000, while the sum is 25.

Adding to 2051511210205 its reverse (5020121151502), we get a palindrome (7071632361707).

The spelling of 2051511210205 in words is "two trillion, fifty-one billion, five hundred eleven million, two hundred ten thousand, two hundred five".