2750201621 has 4 divisors (see below), whose sum is σ = 2768659500. Its totient is φ = 2731743744.

The previous prime is 2750201599. The next prime is 2750201651. The reversal of 2750201621 is 1261020572.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1460386225 + 1289815396 = 38215^2 + 35914^2 .

It is a cyclic number.

It is not a de Polignac number, because 2750201621 - 2³⁰ = 1676459797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2750201651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9228716 + ... + 9229013.

It is an arithmetic number, because the mean of its divisors is an integer number (692164875).

Almost surely, 2^2750201621 is an apocalyptic number.

It is an amenable number.

2750201621 is a deficient number, since it is larger than the sum of its proper divisors (18457879).

2750201621 is a wasteful number, since it uses less digits than its factorization.

2750201621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18457878.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 2750201621 is about 52442.3647540803. The cubic root of 2750201621 is about 1401.0539038832.

The spelling of 2750201621 in words is "two billion, seven hundred fifty million, two hundred one thousand, six hundred twenty-one".