65821055351 has 4 divisors (see below), whose sum is σ = 65821605000. Its totient is φ = 65820505704.

The previous prime is 65821055323. The next prime is 65821055369. The reversal of 65821055351 is 15355012856.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 65821055351 - 2¹⁴ = 65821038967 is a prime.

It is a super-2 number, since 2×65821055351² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65821055299 and 65821055308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65821052351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10376 + ... + 362973.

It is an arithmetic number, because the mean of its divisors is an integer number (16455401250).

Almost surely, 2^65821055351 is an apocalyptic number.

65821055351 is a deficient number, since it is larger than the sum of its proper divisors (549649).

65821055351 is a wasteful number, since it uses less digits than its factorization.

65821055351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549648.

The product of its (nonzero) digits is 180000, while the sum is 41.

The spelling of 65821055351 in words is "sixty-five billion, eight hundred twenty-one million, fifty-five thousand, three hundred fifty-one".