1223311542 has 32 divisors (see below), whose sum is σ = 2580040320. Its totient is φ = 385611840.

The previous prime is 1223311513. The next prime is 1223311613. The reversal of 1223311542 is 2451133221.

It is a super-2 number, since 2×1223311542² = 2992982257580835528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 55698 + ... + 74490.

It is an arithmetic number, because the mean of its divisors is an integer number (80626260).

Almost surely, 2^1223311542 is an apocalyptic number.

1223311542 is an abundant number, since it is smaller than the sum of its proper divisors (1356728778).

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

1223311542 is a wasteful number, since it uses less digits than its factorization.

1223311542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19388.

The product of its digits is 1440, while the sum is 24.

The square root of 1223311542 is about 34975.8708540617. The cubic root of 1223311542 is about 1069.4956548227.

Adding to 1223311542 its reverse (2451133221), we get a palindrome (3674444763).

The spelling of 1223311542 in words is "one billion, two hundred twenty-three million, three hundred eleven thousand, five hundred forty-two".