2550221645 has 8 divisors (see below), whose sum is σ = 3125378304. Its totient is φ = 1996769104.

The previous prime is 2550221621. The next prime is 2550221647. The reversal of 2550221645 is 5461220552.

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

It is a cyclic number.

It is not a de Polignac number, because 2550221645 - 2²⁶ = 2483112781 is a prime.

It is a super-3 number, since 3×2550221645³ (a number of 29 digits) contains 333 as substring.

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 (2550221647) 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, 5425769 + ... + 5426238.

It is an arithmetic number, because the mean of its divisors is an integer number (390672288).

Almost surely, 2^2550221645 is an apocalyptic number.

It is an amenable number.

2550221645 is a deficient number, since it is larger than the sum of its proper divisors (575156659).

2550221645 is a wasteful number, since it uses less digits than its factorization.

2550221645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10852059.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 2550221645 is about 50499.7192566454. The cubic root of 2550221645 is about 1366.2367900090.

The spelling of 2550221645 in words is "two billion, five hundred fifty million, two hundred twenty-one thousand, six hundred forty-five".