211520454072 has 16 divisors (see below), whose sum is σ = 528801135240. Its totient is φ = 70506818016.

The previous prime is 211520454053. The next prime is 211520454083. The reversal of 211520454072 is 270454025112.

211520454072 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211520454072² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4406676103 + ... + 4406676150.

Almost surely, 2^211520454072 is an apocalyptic number.

It is an amenable number.

211520454072 is an abundant number, since it is smaller than the sum of its proper divisors (317280681168).

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

211520454072 is a wasteful number, since it uses less digits than its factorization.

211520454072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8813352262 (or 8813352258 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

Adding to 211520454072 its reverse (270454025112), we get a palindrome (481974479184).

The spelling of 211520454072 in words is "two hundred eleven billion, five hundred twenty million, four hundred fifty-four thousand, seventy-two".