99521151 has 8 divisors (see below), whose sum is σ = 133030704. Its totient is φ = 66179520.

The previous prime is 99521099. The next prime is 99521159. The reversal of 99521151 is 15112599.

It is a happy number.

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

It is not a de Polignac number, because 99521151 - 2¹⁷ = 99390079 is a prime.

It is a super-3 number, since 3×99521151³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99521159) 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, 40590 + ... + 42971.

It is an arithmetic number, because the mean of its divisors is an integer number (16628838).

Almost surely, 2^99521151 is an apocalyptic number.

99521151 is a deficient number, since it is larger than the sum of its proper divisors (33509553).

99521151 is a wasteful number, since it uses less digits than its factorization.

99521151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83961.

The product of its digits is 4050, while the sum is 33.

The square root of 99521151 is about 9976.0288191244. The cubic root of 99521151 is about 463.4168242599.

The spelling of 99521151 in words is "ninety-nine million, five hundred twenty-one thousand, one hundred fifty-one".