99511601 has 12 divisors (see below), whose sum is σ = 115965360. Its totient is φ = 85143240.

The previous prime is 99511597. The next prime is 99511631. The reversal of 99511601 is 10611599.

It is a happy number.

It is not a de Polignac number, because 99511601 - 2² = 99511597 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99511631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32390 + ... + 35328.

It is an arithmetic number, because the mean of its divisors is an integer number (9663780).

Almost surely, 2^99511601 is an apocalyptic number.

It is an amenable number.

99511601 is a deficient number, since it is larger than the sum of its proper divisors (16453759).

99511601 is a wasteful number, since it uses less digits than its factorization.

99511601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3644 (or 3637 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 32.

The square root of 99511601 is about 9975.5501602669. The cubic root of 99511601 is about 463.4020007033.

The spelling of 99511601 in words is "ninety-nine million, five hundred eleven thousand, six hundred one".