1423205516 has 6 divisors (see below), whose sum is σ = 2490609660. Its totient is φ = 711602756.

The previous prime is 1423205513. The next prime is 1423205519. The reversal of 1423205516 is 6155023241.

It is an interprime number because it is at equal distance from previous prime (1423205513) and next prime (1423205519).

It is not an unprimeable number, because it can be changed into a prime (1423205513) 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 as a sum of consecutive naturals, namely, 177900686 + ... + 177900693.

It is an arithmetic number, because the mean of its divisors is an integer number (415101610).

Almost surely, 2^1423205516 is an apocalyptic number.

It is an amenable number.

1423205516 is a deficient number, since it is larger than the sum of its proper divisors (1067404144).

1423205516 is a wasteful number, since it uses less digits than its factorization.

1423205516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355801383 (or 355801381 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1423205516 is about 37725.3961675686. The cubic root of 1423205516 is about 1124.8359967676.

Adding to 1423205516 its reverse (6155023241), we get a palindrome (7578228757).

The spelling of 1423205516 in words is "one billion, four hundred twenty-three million, two hundred five thousand, five hundred sixteen".