1223231523525 has 72 divisors (see below), whose sum is σ = 2390391662880. Its totient is φ = 593014608000.

The previous prime is 1223231523523. The next prime is 1223231523541. The reversal of 1223231523525 is 5253251323221.

1223231523525 is a `hidden beast` number, since 1 + 2 + 23 + 231 + 52 + 352 + 5 = 666.

It is not a de Polignac number, because 1223231523525 - 2¹ = 1223231523523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1223231523525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223231523523) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 27051435 + ... + 27096615.

Almost surely, 2^{1223231523525} is an apocalyptic number.

1223231523525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1223231523525 is a deficient number, since it is larger than the sum of its proper divisors (1167160139355).

1223231523525 is a wasteful number, since it uses less digits than its factorization.

1223231523525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56147 (or 56139 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

Adding to 1223231523525 its reverse (5253251323221), we get a palindrome (6476482846746).

The spelling of 1223231523525 in words is "one trillion, two hundred twenty-three billion, two hundred thirty-one million, five hundred twenty-three thousand, five hundred twenty-five".