211455144450 has 144 divisors (see below), whose sum is σ = 619972569216. Its totient is φ = 51243926400.

The previous prime is 211455144443. The next prime is 211455144463. The reversal of 211455144450 is 54441554112.

211455144450 is a `hidden beast` number, since 2 + 1 + 14 + 55 + 144 + 450 = 666.

It is a super-2 number, since 2×211455144450² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 19066807 + ... + 19077893.

It is an arithmetic number, because the mean of its divisors is an integer number (4305365064).

Almost surely, 2^211455144450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211455144450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309986284608).

211455144450 is an abundant number, since it is smaller than the sum of its proper divisors (408517424766).

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

211455144450 is a wasteful number, since it uses less digits than its factorization.

211455144450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14969 (or 14961 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 36.

Adding to 211455144450 its reverse (54441554112), we get a palindrome (265896698562).

The spelling of 211455144450 in words is "two hundred eleven billion, four hundred fifty-five million, one hundred forty-four thousand, four hundred fifty".