656213212341 has 48 divisors (see below), whose sum is σ = 979708150512. Its totient is φ = 422986060800.

The previous prime is 656213212321. The next prime is 656213212363. The reversal of 656213212341 is 143212312656.

656213212341 is a `hidden beast` number, since 6 + 5 + 621 + 3 + 2 + 1 + 23 + 4 + 1 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 23625227025 + 632587985316 = 153705^2 + 795354^2 .

It is not a de Polignac number, because 656213212341 - 2¹⁷ = 656213081269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 656213212296 and 656213212305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656213212321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19552411 + ... + 19585943.

It is an arithmetic number, because the mean of its divisors is an integer number (20410586469).

Almost surely, 2^656213212341 is an apocalyptic number.

It is an amenable number.

656213212341 is a deficient number, since it is larger than the sum of its proper divisors (323494938171).

656213212341 is a wasteful number, since it uses less digits than its factorization.

656213212341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34054 (or 34051 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

Adding to 656213212341 its reverse (143212312656), we get a palindrome (799425524997).

The spelling of 656213212341 in words is "six hundred fifty-six billion, two hundred thirteen million, two hundred twelve thousand, three hundred forty-one".