2254016156221 has 4 divisors (see below), whose sum is σ = 2255538113244. Its totient is φ = 2252494199200.

The previous prime is 2254016156209. The next prime is 2254016156243. The reversal of 2254016156221 is 1226516104522.

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 1011404330596 + 1242611825625 = 1005686^2 + 1114725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2254016156221 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 (2254016156521) 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, 760976290 + ... + 760979251.

It is an arithmetic number, because the mean of its divisors is an integer number (563884528311).

Almost surely, 2^{2254016156221} is an apocalyptic number.

It is an amenable number.

2254016156221 is a deficient number, since it is larger than the sum of its proper divisors (1521957023).

2254016156221 is a wasteful number, since it uses less digits than its factorization.

2254016156221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521957022.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 2254016156221 in words is "two trillion, two hundred fifty-four billion, sixteen million, one hundred fifty-six thousand, two hundred twenty-one".