2455551534221 has 2 divisors, whose sum is σ = 2455551534222. Its totient is φ = 2455551534220.

The previous prime is 2455551534217. The next prime is 2455551534223. The reversal of 2455551534221 is 1224351555542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2096744544196 + 358806990025 = 1448014^2 + 599005^2 .

It is a cyclic number.

It is not a de Polignac number, because 2455551534221 - 2² = 2455551534217 is a prime.

Together with 2455551534223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2455551534223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1227775767110 + 1227775767111.

It is an arithmetic number, because the mean of its divisors is an integer number (1227775767111).

Almost surely, 2^{2455551534221} is an apocalyptic number.

It is an amenable number.

2455551534221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2455551534221 is an equidigital number, since it uses as much as digits as its factorization.

2455551534221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200000, while the sum is 44.

The spelling of 2455551534221 in words is "two trillion, four hundred fifty-five billion, five hundred fifty-one million, five hundred thirty-four thousand, two hundred twenty-one".