99810551 has 2 divisors, whose sum is σ = 99810552. Its totient is φ = 99810550.

The previous prime is 99810541. The next prime is 99810559. The reversal of 99810551 is 15501899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99810551 - 2²² = 95616247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99810559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49905275 + 49905276.

It is an arithmetic number, because the mean of its divisors is an integer number (49905276).

Almost surely, 2^99810551 is an apocalyptic number.

99810551 is a deficient number, since it is larger than the sum of its proper divisors (1).

99810551 is an equidigital number, since it uses as much as digits as its factorization.

99810551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 99810551 is about 9990.5230593798. The cubic root of 99810551 is about 463.8655832776.

The spelling of 99810551 in words is "ninety-nine million, eight hundred ten thousand, five hundred fifty-one".