211313550 has 48 divisors (see below), whose sum is σ = 598925952. Its totient is φ = 48300000.

The previous prime is 211313539. The next prime is 211313603. The reversal of 211313550 is 55313112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99576 + ... + 101675.

It is an arithmetic number, because the mean of its divisors is an integer number (12477624).

Almost surely, 2^211313550 is an apocalyptic number.

211313550 is an abundant number, since it is smaller than the sum of its proper divisors (387612402).

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

211313550 is a wasteful number, since it uses less digits than its factorization.

211313550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201273 (or 201268 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 211313550 is about 14536.6278758177. The cubic root of 211313550 is about 595.6289279888.

Adding to 211313550 its reverse (55313112), we get a palindrome (266626662).

The spelling of 211313550 in words is "two hundred eleven million, three hundred thirteen thousand, five hundred fifty".