6400103521 has 8 divisors (see below), whose sum is σ = 7337925504. Its totient is φ = 5468161920.

The previous prime is 6400103519. The next prime is 6400103537. The reversal of 6400103521 is 1253010046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6400103521 - 2¹ = 6400103519 is a prime.

It is a super-2 number, since 2×6400103521² = 81922650159033194882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6400103492 and 6400103501.

It is not an unprimeable number, because it can be changed into a prime (6400104521) 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 7 ways as a sum of consecutive naturals, for example, 1467760 + ... + 1472113.

It is an arithmetic number, because the mean of its divisors is an integer number (917240688).

Almost surely, 2^6400103521 is an apocalyptic number.

It is an amenable number.

6400103521 is a deficient number, since it is larger than the sum of its proper divisors (937821983).

6400103521 is a wasteful number, since it uses less digits than its factorization.

6400103521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940191.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 6400103521 is about 80000.6470036337. The cubic root of 6400103521 is about 1856.6455438478.

Adding to 6400103521 its reverse (1253010046), we get a palindrome (7653113567).

The spelling of 6400103521 in words is "six billion, four hundred million, one hundred three thousand, five hundred twenty-one".