854051517221 has 32 divisors (see below), whose sum is σ = 991011594240. Its totient is φ = 720881606016.

The previous prime is 854051517199. The next prime is 854051517223. The reversal of 854051517221 is 122715150458.

It is a cyclic number.

It is not a de Polignac number, because 854051517221 - 2³⁸ = 579173610277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (854051517223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 624762680 + ... + 624764046.

It is an arithmetic number, because the mean of its divisors is an integer number (30969112320).

Almost surely, 2^854051517221 is an apocalyptic number.

It is an amenable number.

854051517221 is a deficient number, since it is larger than the sum of its proper divisors (136960077019).

854051517221 is a wasteful number, since it uses less digits than its factorization.

854051517221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3593.

The product of its (nonzero) digits is 112000, while the sum is 41.

Adding to 854051517221 its reverse (122715150458), we get a palindrome (976766667679).

The spelling of 854051517221 in words is "eight hundred fifty-four billion, fifty-one million, five hundred seventeen thousand, two hundred twenty-one".