99515251 has 4 divisors (see below), whose sum is σ = 108562104. Its totient is φ = 90468400.

The previous prime is 99515231. The next prime is 99515267. The reversal of 99515251 is 15251599.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 99515251 - 2¹⁹ = 98990963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99515251.

It is not an unprimeable number, because it can be changed into a prime (99515231) 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 in 3 ways as a sum of consecutive naturals, for example, 4523410 + ... + 4523431.

It is an arithmetic number, because the mean of its divisors is an integer number (27140526).

Almost surely, 2^99515251 is an apocalyptic number.

99515251 is a deficient number, since it is larger than the sum of its proper divisors (9046853).

99515251 is a wasteful number, since it uses less digits than its factorization.

99515251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9046852.

The product of its digits is 20250, while the sum is 37.

The square root of 99515251 is about 9975.7331058925. The cubic root of 99515251 is about 463.4076663631.

The spelling of 99515251 in words is "ninety-nine million, five hundred fifteen thousand, two hundred fifty-one".