211651502050 has 12 divisors (see below), whose sum is σ = 393671793906. Its totient is φ = 84660600800.

The previous prime is 211651502039. The next prime is 211651502057. The reversal of 211651502050 is 50205156112.

It can be written as a sum of positive squares in 3 ways, for example, as 96980547889 + 114670954161 = 311417^2 + 338631^2 .

It is not an unprimeable number, because it can be changed into a prime (211651502057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2116514971 + ... + 2116515070.

Almost surely, 2^211651502050 is an apocalyptic number.

211651502050 is a deficient number, since it is larger than the sum of its proper divisors (182020291856).

211651502050 is a wasteful number, since it uses less digits than its factorization.

211651502050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4233030053 (or 4233030048 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 211651502050 its reverse (50205156112), we get a palindrome (261856658162).

The spelling of 211651502050 in words is "two hundred eleven billion, six hundred fifty-one million, five hundred two thousand, fifty".