99555501 has 8 divisors (see below), whose sum is σ = 134722144. Its totient is φ = 65379600.

The previous prime is 99555499. The next prime is 99555559. The reversal of 99555501 is 10555599.

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 99555501 - 2¹ = 99555499 is a prime.

It is a super-2 number, since 2×99555501² = 19822595558722002, which contains 22 as substring.

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 99555501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99555581) 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, 247450 + ... + 247851.

It is an arithmetic number, because the mean of its divisors is an integer number (16840268).

Almost surely, 2^99555501 is an apocalyptic number.

It is an amenable number.

99555501 is a deficient number, since it is larger than the sum of its proper divisors (35166643).

99555501 is a wasteful number, since it uses less digits than its factorization.

99555501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495371.

The product of its (nonzero) digits is 50625, while the sum is 39.

The square root of 99555501 is about 9977.7502975370. The cubic root of 99555501 is about 463.4701346590.

The spelling of 99555501 in words is "ninety-nine million, five hundred fifty-five thousand, five hundred one".