2154556402217 has 8 divisors (see below), whose sum is σ = 2197618128000. Its totient is φ = 2111583925360.

The previous prime is 2154556402133. The next prime is 2154556402309. The reversal of 2154556402217 is 7122046554512.

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 2154556402217 - 2²⁴ = 2154539625001 is a prime.

It is a super-2 number, since 2×2154556402217² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154556408217) 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, 22263467 + ... + 22360032.

It is an arithmetic number, because the mean of its divisors is an integer number (274702266000).

Almost surely, 2^{2154556402217} is an apocalyptic number.

It is an amenable number.

2154556402217 is a deficient number, since it is larger than the sum of its proper divisors (43061725783).

2154556402217 is an equidigital number, since it uses as much as digits as its factorization.

2154556402217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44624463.

The product of its (nonzero) digits is 672000, while the sum is 44.

The spelling of 2154556402217 in words is "two trillion, one hundred fifty-four billion, five hundred fifty-six million, four hundred two thousand, two hundred seventeen".