55207099 has 4 divisors (see below), whose sum is σ = 55235160. Its totient is φ = 55179040.

The previous prime is 55207057. The next prime is 55207111. The reversal of 55207099 is 99070255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99070255 = 5 ⋅19814051.

It is a cyclic number.

It is not a de Polignac number, because 55207099 - 2⁹ = 55206587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55207499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10837 + ... + 15094.

It is an arithmetic number, because the mean of its divisors is an integer number (13808790).

Almost surely, 2^55207099 is an apocalyptic number.

55207099 is a deficient number, since it is larger than the sum of its proper divisors (28061).

55207099 is a wasteful number, since it uses less digits than its factorization.

55207099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28060.

The product of its (nonzero) digits is 28350, while the sum is 37.

The square root of 55207099 is about 7430.1479796839. The cubic root of 55207099 is about 380.7719740624.

The spelling of 55207099 in words is "fifty-five million, two hundred seven thousand, ninety-nine".