2209545 has 32 divisors (see below), whose sum is σ = 4233600. Its totient is φ = 1086912.

The previous prime is 2209523. The next prime is 2209547. The reversal of 2209545 is 5459022.

It is not a de Polignac number, because 2209545 - 2⁸ = 2209289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

2209545 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2209547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1126 + ... + 2384.

It is an arithmetic number, because the mean of its divisors is an integer number (132300).

2^2209545 is an apocalyptic number.

It is an amenable number.

2209545 is a deficient number, since it is larger than the sum of its proper divisors (2024055).

2209545 is a wasteful number, since it uses less digits than its factorization.

2209545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286 (or 1280 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 2209545 is about 1486.4538337937. The cubic root of 2209545 is about 130.2469664279.

The spelling of 2209545 in words is "two million, two hundred nine thousand, five hundred forty-five".