1661517222 has 16 divisors (see below), whose sum is σ = 3325710000. Its totient is φ = 553393152.

The previous prime is 1661517211. The next prime is 1661517229. The reversal of 1661517222 is 2227151661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661517229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103363 + ... + 118350.

It is an arithmetic number, because the mean of its divisors is an integer number (207856875).

Almost surely, 2^1661517222 is an apocalyptic number.

1661517222 is an abundant number, since it is smaller than the sum of its proper divisors (1664192778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661517222 is a wasteful number, since it uses less digits than its factorization.

1661517222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222967.

The product of its digits is 10080, while the sum is 33.

The square root of 1661517222 is about 40761.7126970887. The cubic root of 1661517222 is about 1184.4087734184.

Adding to 1661517222 its reverse (2227151661), we get a palindrome (3888668883).

The spelling of 1661517222 in words is "one billion, six hundred sixty-one million, five hundred seventeen thousand, two hundred twenty-two".