209244453 has 12 divisors (see below), whose sum is σ = 306661824. Its totient is φ = 126814600.

The previous prime is 209244439. The next prime is 209244461. The reversal of 209244453 is 354442902.

It is not a de Polignac number, because 209244453 - 2²⁰ = 208195877 is a prime.

It is a super-2 number, since 2×209244453² = 87566482222538418, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209244463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 287853 + ... + 288578.

It is an arithmetic number, because the mean of its divisors is an integer number (25555152).

Almost surely, 2^209244453 is an apocalyptic number.

It is an amenable number.

209244453 is a deficient number, since it is larger than the sum of its proper divisors (97417371).

209244453 is a wasteful number, since it uses less digits than its factorization.

209244453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576456 (or 576445 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 209244453 is about 14465.2844078504. The cubic root of 209244453 is about 593.6784954261.

The spelling of 209244453 in words is "two hundred nine million, two hundred forty-four thousand, four hundred fifty-three".