211555254225532 has 72 divisors (see below), whose sum is σ = 434877143186304. Its totient is φ = 89780113207008.

The previous prime is 211555254225509. The next prime is 211555254225541. The reversal of 211555254225532 is 235522452555112.

It is a super-2 number, since 2×211555254225532² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 299782563 + ... + 300487429.

It is an arithmetic number, because the mean of its divisors is an integer number (6039960322032).

Almost surely, 2^{211555254225532} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211555254225532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217438571593152).

211555254225532 is an abundant number, since it is smaller than the sum of its proper divisors (223321888960772).

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

211555254225532 is a wasteful number, since it uses less digits than its factorization.

211555254225532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719855 (or 719846 counting only the distinct ones).

The product of its digits is 6000000, while the sum is 49.

The spelling of 211555254225532 in words is "two hundred eleven trillion, five hundred fifty-five billion, two hundred fifty-four million, two hundred twenty-five thousand, five hundred thirty-two".