211550030553 has 16 divisors (see below), whose sum is σ = 283586688000. Its totient is φ = 140273589120.

The previous prime is 211550030551. The next prime is 211550030569. The reversal of 211550030553 is 355030055112.

It is not a de Polignac number, because 211550030553 - 2¹ = 211550030551 is a prime.

It is a super-4 number, since 4×211550030553⁴ (a number of 46 digits) contains 4444 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 211550030553.

It is not an unprimeable number, because it can be changed into a prime (211550030551) 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, 4324173 + ... + 4372821.

It is an arithmetic number, because the mean of its divisors is an integer number (17724168000).

Almost surely, 2^211550030553 is an apocalyptic number.

It is an amenable number.

211550030553 is a deficient number, since it is larger than the sum of its proper divisors (72036657447).

211550030553 is a wasteful number, since it uses less digits than its factorization.

211550030553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56432.

The product of its (nonzero) digits is 11250, while the sum is 30.

Adding to 211550030553 its reverse (355030055112), we get a palindrome (566580085665).

The spelling of 211550030553 in words is "two hundred eleven billion, five hundred fifty million, thirty thousand, five hundred fifty-three".