210651420231 has 32 divisors (see below), whose sum is σ = 362505369600. Its totient is φ = 118398918240.

The previous prime is 210651420139. The next prime is 210651420271. The reversal of 210651420231 is 132024156012.

210651420231 is a `hidden beast` number, since 2 + 1 + 0 + 6 + 5 + 1 + 420 + 231 = 666.

210651420231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 210651420231 - 2¹⁰ = 210651419207 is a prime.

It is a super-2 number, since 2×210651420231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 210651420195 and 210651420204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210651420271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9124191 + ... + 9147248.

It is an arithmetic number, because the mean of its divisors is an integer number (11328292800).

Almost surely, 2^210651420231 is an apocalyptic number.

210651420231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

210651420231 is a deficient number, since it is larger than the sum of its proper divisors (151853949369).

210651420231 is a wasteful number, since it uses less digits than its factorization.

210651420231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18271516 (or 18271510 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 210651420231 its reverse (132024156012), we get a palindrome (342675576243).

The spelling of 210651420231 in words is "two hundred ten billion, six hundred fifty-one million, four hundred twenty thousand, two hundred thirty-one".