99816251 has 8 divisors (see below), whose sum is σ = 104735904. Its totient is φ = 94944960.

The previous prime is 99816239. The next prime is 99816271. The reversal of 99816251 is 15261899.

It is a happy number.

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 99816251 - 2²² = 95621947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99816199 and 99816208.

It is not an unprimeable number, because it can be changed into a prime (99816221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7826 + ... + 16151.

It is an arithmetic number, because the mean of its divisors is an integer number (13091988).

Almost surely, 2^99816251 is an apocalyptic number.

99816251 is a deficient number, since it is larger than the sum of its proper divisors (4919653).

99816251 is a wasteful number, since it uses less digits than its factorization.

99816251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24181.

The product of its digits is 38880, while the sum is 41.

The square root of 99816251 is about 9990.8083256561. The cubic root of 99816251 is about 463.8744132842.

The spelling of 99816251 in words is "ninety-nine million, eight hundred sixteen thousand, two hundred fifty-one".