217145668000254 has 16 divisors (see below), whose sum is σ = 496332955429248. Its totient is φ = 62041619428632.

The previous prime is 217145668000211. The next prime is 217145668000271. The reversal of 217145668000254 is 452000866541712.

It is a super-2 number, since 2×217145668000254² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 217145668000197 and 217145668000206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2585067476152 + ... + 2585067476235.

It is an arithmetic number, because the mean of its divisors is an integer number (31020809714328).

Almost surely, 2^{217145668000254} is an apocalyptic number.

217145668000254 is an abundant number, since it is smaller than the sum of its proper divisors (279187287428994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217145668000254 is a wasteful number, since it uses less digits than its factorization.

217145668000254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5170134952399.

The product of its (nonzero) digits is 3225600, while the sum is 51.

The spelling of 217145668000254 in words is "two hundred seventeen trillion, one hundred forty-five billion, six hundred sixty-eight million, two hundred fifty-four", and thus it is an aban number.