99570551 has 2 divisors, whose sum is σ = 99570552. Its totient is φ = 99570550.

The previous prime is 99570529. The next prime is 99570571. The reversal of 99570551 is 15507599.

It is a strong prime.

It is an emirp because it is prime and its reverse (15507599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99570551 - 2²² = 95376247 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99570499 and 99570508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99570571) 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 as a sum of consecutive naturals, namely, 49785275 + 49785276.

It is an arithmetic number, because the mean of its divisors is an integer number (49785276).

Almost surely, 2^99570551 is an apocalyptic number.

99570551 is a deficient number, since it is larger than the sum of its proper divisors (1).

99570551 is an equidigital number, since it uses as much as digits as its factorization.

99570551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70875, while the sum is 41.

The square root of 99570551 is about 9978.5044470602. The cubic root of 99570551 is about 463.4934880448.

The spelling of 99570551 in words is "ninety-nine million, five hundred seventy thousand, five hundred fifty-one".