645227103 has 4 divisors (see below), whose sum is σ = 860302808. Its totient is φ = 430151400.

The previous prime is 645227041. The next prime is 645227111. The reversal of 645227103 is 301722546.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 645227103 - 2⁸ = 645226847 is a prime.

It is a super-3 number, since 3×645227103³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645227203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107537848 + ... + 107537853.

It is an arithmetic number, because the mean of its divisors is an integer number (215075702).

Almost surely, 2^645227103 is an apocalyptic number.

645227103 is a deficient number, since it is larger than the sum of its proper divisors (215075705).

645227103 is a wasteful number, since it uses less digits than its factorization.

645227103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215075704.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 645227103 is about 25401.3208908513. The cubic root of 645227103 is about 864.1136534411.

Adding to 645227103 its reverse (301722546), we get a palindrome (946949649).

The spelling of 645227103 in words is "six hundred forty-five million, two hundred twenty-seven thousand, one hundred three".