99945552 has 40 divisors (see below), whose sum is σ = 295078336. Its totient is φ = 28555776.

The previous prime is 99945497. The next prime is 99945553. The reversal of 99945552 is 25554999.

It is a happy number.

It is a super-2 number, since 2×99945552² = 19978226729169408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99945553) 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, 148393 + ... + 149064.

Almost surely, 2^99945552 is an apocalyptic number.

It is an amenable number.

99945552 is an abundant number, since it is smaller than the sum of its proper divisors (195132784).

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

99945552 is a wasteful number, since it uses less digits than its factorization.

99945552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297475 (or 297469 counting only the distinct ones).

The product of its digits is 729000, while the sum is 48.

The square root of 99945552 is about 9997.2772293260. The cubic root of 99945552 is about 464.0746263244.

The spelling of 99945552 in words is "ninety-nine million, nine hundred forty-five thousand, five hundred fifty-two".