211805025145 has 8 divisors (see below), whose sum is σ = 290475463104. Its totient is φ = 145237731504.

The previous prime is 211805025067. The next prime is 211805025209. The reversal of 211805025145 is 541520508112.

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 211805025145 - 2³³ = 203215090553 is a prime.

It is a super-2 number, since 2×211805025145² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211805025145.

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, 3025786039 + ... + 3025786108.

It is an arithmetic number, because the mean of its divisors is an integer number (36309432888).

Almost surely, 2^211805025145 is an apocalyptic number.

It is an amenable number.

211805025145 is a deficient number, since it is larger than the sum of its proper divisors (78670437959).

211805025145 is an equidigital number, since it uses as much as digits as its factorization.

211805025145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6051572159.

The product of its (nonzero) digits is 16000, while the sum is 34.

The spelling of 211805025145 in words is "two hundred eleven billion, eight hundred five million, twenty-five thousand, one hundred forty-five".