99955545 has 16 divisors (see below), whose sum is σ = 160164672. Its totient is φ = 53231040.

The previous prime is 99955519. The next prime is 99955567. The reversal of 99955545 is 54555999.

It is not a de Polignac number, because 99955545 - 2⁶ = 99955481 is a prime.

It is a super-2 number, since 2×99955545² = 19982221952494050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6450 + ... + 15540.

It is an arithmetic number, because the mean of its divisors is an integer number (10010292).

Almost surely, 2^99955545 is an apocalyptic number.

It is an amenable number.

99955545 is a deficient number, since it is larger than the sum of its proper divisors (60209127).

99955545 is a wasteful number, since it uses less digits than its factorization.

99955545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9832.

The product of its digits is 1822500, while the sum is 51.

The square root of 99955545 is about 9997.7770029142. Note that the first 3 decimals coincide. The cubic root of 99955545 is about 464.0900925561.

Subtracting from 99955545 its product of digits (1822500), we obtain a triangular number (98133045 = T₁₄₀₀₉).

The spelling of 99955545 in words is "ninety-nine million, nine hundred fifty-five thousand, five hundred forty-five".