1645541222 has 8 divisors (see below), whose sum is σ = 2658182016. Its totient is φ = 759480552.

The previous prime is 1645541213. The next prime is 1645541237. The reversal of 1645541222 is 2221455461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31644998 + ... + 31645049.

It is an arithmetic number, because the mean of its divisors is an integer number (332272752).

Almost surely, 2^1645541222 is an apocalyptic number.

1645541222 is a deficient number, since it is larger than the sum of its proper divisors (1012640794).

1645541222 is a wasteful number, since it uses less digits than its factorization.

1645541222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63290062.

The product of its digits is 19200, while the sum is 32.

The square root of 1645541222 is about 40565.2711318438. The cubic root of 1645541222 is about 1180.6003891913.

Adding to 1645541222 its reverse (2221455461), we get a palindrome (3866996683).

The spelling of 1645541222 in words is "one billion, six hundred forty-five million, five hundred forty-one thousand, two hundred twenty-two".