211555522315245 has 16 divisors (see below), whose sum is σ = 338565922768512. Its totient is φ = 112803916213440.

The previous prime is 211555522315243. The next prime is 211555522315331. The reversal of 211555522315245 is 542513225555112.

It is not a de Polignac number, because 211555522315245 - 2¹ = 211555522315243 is a prime.

It is a super-2 number, since 2×211555522315245² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211555522315194 and 211555522315203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211555522315243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1605912442 + ... + 1606044171.

It is an arithmetic number, because the mean of its divisors is an integer number (21160370173032).

Almost surely, 2^{211555522315245} is an apocalyptic number.

It is an amenable number.

211555522315245 is a deficient number, since it is larger than the sum of its proper divisors (127010400453267).

211555522315245 is a wasteful number, since it uses less digits than its factorization.

211555522315245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211961012.

The product of its digits is 3000000, while the sum is 48.

The spelling of 211555522315245 in words is "two hundred eleven trillion, five hundred fifty-five billion, five hundred twenty-two million, three hundred fifteen thousand, two hundred forty-five".