209019153 has 24 divisors (see below), whose sum is σ = 335378880. Its totient is φ = 115318560.

The previous prime is 209019127. The next prime is 209019157. The reversal of 209019153 is 351910902.

It is not a de Polignac number, because 209019153 - 2⁸ = 209018897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 209019153.

It is not an unprimeable number, because it can be changed into a prime (209019157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20253 + ... + 28778.

It is an arithmetic number, because the mean of its divisors is an integer number (13974120).

Almost surely, 2^209019153 is an apocalyptic number.

It is an amenable number.

209019153 is a deficient number, since it is larger than the sum of its proper divisors (126359727).

209019153 is a wasteful number, since it uses less digits than its factorization.

209019153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49077 (or 49070 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 209019153 is about 14457.4946999817. The cubic root of 209019153 is about 593.4653415477.

The spelling of 209019153 in words is "two hundred nine million, nineteen thousand, one hundred fifty-three".