99542556 has 36 divisors (see below), whose sum is σ = 253470672. Its totient is φ = 32937024.

The previous prime is 99542507. The next prime is 99542557. The reversal of 99542556 is 65524599.

It is a happy number.

99542556 is a `hidden beast` number, since 9 + 95 + 4 + 2 + 556 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99542557) 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, 5160 + ... + 15023.

It is an arithmetic number, because the mean of its divisors is an integer number (7040852).

Almost surely, 2^99542556 is an apocalyptic number.

It is an amenable number.

99542556 is an abundant number, since it is smaller than the sum of its proper divisors (153928116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99542556 is a wasteful number, since it uses less digits than its factorization.

99542556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20330 (or 20325 counting only the distinct ones).

The product of its digits is 486000, while the sum is 45.

The square root of 99542556 is about 9977.1015831252. The cubic root of 99542556 is about 463.4500457609.

The spelling of 99542556 in words is "ninety-nine million, five hundred forty-two thousand, five hundred fifty-six".