1231204522 has 16 divisors (see below), whose sum is σ = 1980689760. Its totient is φ = 572197392.

The previous prime is 1231204477. The next prime is 1231204523. The reversal of 1231204522 is 2254021321.

It is a happy number.

It is a super-3 number, since 3×1231204522³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231204493 and 1231204502.

It is not an unprimeable number, because it can be changed into a prime (1231204523) 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 in 7 ways as a sum of consecutive naturals, for example, 303648 + ... + 307675.

It is an arithmetic number, because the mean of its divisors is an integer number (123793110).

Almost surely, 2^1231204522 is an apocalyptic number.

1231204522 is a deficient number, since it is larger than the sum of its proper divisors (749485238).

1231204522 is a wasteful number, since it uses less digits than its factorization.

1231204522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611397.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1231204522 is about 35088.5240783935. The cubic root of 1231204522 is about 1071.7909047936.

Adding to 1231204522 its reverse (2254021321), we get a palindrome (3485225843).

The spelling of 1231204522 in words is "one billion, two hundred thirty-one million, two hundred four thousand, five hundred twenty-two".