2455440221 has 4 divisors (see below), whose sum is σ = 2644320252. Its totient is φ = 2266560192.

The previous prime is 2455440209. The next prime is 2455440269. The reversal of 2455440221 is 1220445542.

2455440221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1010604100 + 1444836121 = 31790^2 + 38011^2 .

It is not a de Polignac number, because 2455440221 - 2¹⁴ = 2455423837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2455449221) 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, 94439996 + ... + 94440021.

It is an arithmetic number, because the mean of its divisors is an integer number (661080063).

Almost surely, 2^2455440221 is an apocalyptic number.

It is an amenable number.

2455440221 is a deficient number, since it is larger than the sum of its proper divisors (188880031).

2455440221 is a wasteful number, since it uses less digits than its factorization.

2455440221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188880030.

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 2455440221 is about 49552.3987411306. The cubic root of 2455440221 is about 1349.0968300113.

Adding to 2455440221 its reverse (1220445542), we get a palindrome (3675885763).

The spelling of 2455440221 in words is "two billion, four hundred fifty-five million, four hundred forty thousand, two hundred twenty-one".