99900251 has 8 divisors (see below), whose sum is σ = 109187904. Its totient is φ = 90646920.

The previous prime is 99900221. The next prime is 99900253. The reversal of 99900251 is 15200999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99900251 - 2¹⁴ = 99883867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99900253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2285 + ... + 14318.

It is an arithmetic number, because the mean of its divisors is an integer number (13648488).

Almost surely, 2^99900251 is an apocalyptic number.

99900251 is a deficient number, since it is larger than the sum of its proper divisors (9287653).

99900251 is a wasteful number, since it uses less digits than its factorization.

99900251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17161.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 99900251 is about 9995.0113056464. The cubic root of 99900251 is about 464.0045007367.

The spelling of 99900251 in words is "ninety-nine million, nine hundred thousand, two hundred fifty-one".