9955514521 has 2 divisors, whose sum is σ = 9955514522. Its totient is φ = 9955514520.

The previous prime is 9955514441. The next prime is 9955514581. The reversal of 9955514521 is 1254155599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7796890000 + 2158624521 = 88300^2 + 46461^2 .

It is a cyclic number.

It is not a de Polignac number, because 9955514521 - 2¹¹ = 9955512473 is a prime.

It is a super-2 number, since 2×9955514521² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9955514581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4977757260 + 4977757261.

It is an arithmetic number, because the mean of its divisors is an integer number (4977757261).

Almost surely, 2^9955514521 is an apocalyptic number.

It is an amenable number.

9955514521 is a deficient number, since it is larger than the sum of its proper divisors (1).

9955514521 is an equidigital number, since it uses as much as digits as its factorization.

9955514521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 405000, while the sum is 46.

The square root of 9955514521 is about 99777.3246835171. The cubic root of 9955514521 is about 2151.2352390557.

The spelling of 9955514521 in words is "nine billion, nine hundred fifty-five million, five hundred fourteen thousand, five hundred twenty-one".