2455212221 has 8 divisors (see below), whose sum is σ = 3061043904. Its totient is φ = 1913152320.

The previous prime is 2455212217. The next prime is 2455212223. The reversal of 2455212221 is 1222125542.

2455212221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2455212221 - 2² = 2455212217 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 (2455212223) 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, 15942860 + ... + 15943013.

It is an arithmetic number, because the mean of its divisors is an integer number (382630488).

Almost surely, 2^2455212221 is an apocalyptic number.

It is an amenable number.

2455212221 is a deficient number, since it is larger than the sum of its proper divisors (605831683).

2455212221 is a wasteful number, since it uses less digits than its factorization.

2455212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31885891.

The product of its digits is 3200, while the sum is 26.

The square root of 2455212221 is about 49550.0980927384. The cubic root of 2455212221 is about 1349.0550719054.

Adding to 2455212221 its reverse (1222125542), we get a palindrome (3677337763).

It can be divided in two parts, 245521 and 2221, that added together give a palindrome (247742).

The spelling of 2455212221 in words is "two billion, four hundred fifty-five million, two hundred twelve thousand, two hundred twenty-one".