9513801221 has 4 divisors (see below), whose sum is σ = 9514910112. Its totient is φ = 9512692332.

The previous prime is 9513801191. The next prime is 9513801223. The reversal of 9513801221 is 1221083159.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9513801221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9513801223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541475 + ... + 558768.

It is an arithmetic number, because the mean of its divisors is an integer number (2378727528).

Almost surely, 2^9513801221 is an apocalyptic number.

It is an amenable number.

9513801221 is a deficient number, since it is larger than the sum of its proper divisors (1108891).

9513801221 is a wasteful number, since it uses less digits than its factorization.

9513801221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108890.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 9513801221 is about 97538.7165232350. The cubic root of 9513801221 is about 2118.9369017941.

The spelling of 9513801221 in words is "nine billion, five hundred thirteen million, eight hundred one thousand, two hundred twenty-one".