211257163066254 has 64 divisors (see below), whose sum is σ = 430678735153920. Its totient is φ = 69064994718720.

The previous prime is 211257163066253. The next prime is 211257163066283. The reversal of 211257163066254 is 452660361752112.

It is a junction number, because it is equal to n+sod(n) for n = 211257163066197 and 211257163066206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211257163066253) 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, 4746583069 + ... + 4746627575.

It is an arithmetic number, because the mean of its divisors is an integer number (6729355236780).

Almost surely, 2^{211257163066254} is an apocalyptic number.

211257163066254 is an abundant number, since it is smaller than the sum of its proper divisors (219421572087666).

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

211257163066254 is a wasteful number, since it uses less digits than its factorization.

211257163066254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81665.

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 211257163066254 in words is "two hundred eleven trillion, two hundred fifty-seven billion, one hundred sixty-three million, sixty-six thousand, two hundred fifty-four".