99211517 has 2 divisors, whose sum is σ = 99211518. Its totient is φ = 99211516.

The previous prime is 99211481. The next prime is 99211537. The reversal of 99211517 is 71511299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98624761 + 586756 = 9931^2 + 766^2 .

It is a cyclic number.

It is not a de Polignac number, because 99211517 - 2⁸ = 99211261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99211537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49605758 + 49605759.

It is an arithmetic number, because the mean of its divisors is an integer number (49605759).

Almost surely, 2^99211517 is an apocalyptic number.

It is an amenable number.

99211517 is a deficient number, since it is larger than the sum of its proper divisors (1).

99211517 is an equidigital number, since it uses as much as digits as its factorization.

99211517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 35.

The square root of 99211517 is about 9960.4978289240. The cubic root of 99211517 is about 462.9357249445.

The spelling of 99211517 in words is "ninety-nine million, two hundred eleven thousand, five hundred seventeen".