211513056 has 48 divisors (see below), whose sum is σ = 557447184. Its totient is φ = 70221824.

The previous prime is 211513051. The next prime is 211513063. The reversal of 211513056 is 650315112.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211513051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20386 + ... + 28958.

It is an arithmetic number, because the mean of its divisors is an integer number (11613483).

Almost surely, 2^211513056 is an apocalyptic number.

It is an amenable number.

211513056 is an abundant number, since it is smaller than the sum of its proper divisors (345934128).

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

211513056 is a wasteful number, since it uses less digits than its factorization.

211513056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8843 (or 8835 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 211513056 is about 14543.4884398483. The cubic root of 211513056 is about 595.8163180344.

Adding to 211513056 its reverse (650315112), we get a palindrome (861828168).

The spelling of 211513056 in words is "two hundred eleven million, five hundred thirteen thousand, fifty-six".