99319551 has 8 divisors (see below), whose sum is σ = 135505920. Its totient is φ = 64673112.

The previous prime is 99319513. The next prime is 99319553. The reversal of 99319551 is 15591399.

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

It is not a de Polignac number, because 99319551 - 2¹⁸ = 99057407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99319553) 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, 384831 + ... + 385088.

It is an arithmetic number, because the mean of its divisors is an integer number (16938240).

Almost surely, 2^99319551 is an apocalyptic number.

99319551 is a deficient number, since it is larger than the sum of its proper divisors (36186369).

99319551 is a wasteful number, since it uses less digits than its factorization.

99319551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769965.

The product of its digits is 54675, while the sum is 42.

The square root of 99319551 is about 9965.9194758938. The cubic root of 99319551 is about 463.1036982376.

The spelling of 99319551 in words is "ninety-nine million, three hundred nineteen thousand, five hundred fifty-one".