1231055523530 has 16 divisors (see below), whose sum is σ = 2532457077120. Its totient is φ = 422076179472.

The previous prime is 1231055523527. The next prime is 1231055523587. The reversal of 1231055523530 is 353255501321.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8793253670 + ... + 8793253809.

It is an arithmetic number, because the mean of its divisors is an integer number (158278567320).

Almost surely, 2^{1231055523530} is an apocalyptic number.

1231055523530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231055523530 is an abundant number, since it is smaller than the sum of its proper divisors (1301401553590).

1231055523530 is a wasteful number, since it uses less digits than its factorization.

1231055523530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17586507493.

The product of its (nonzero) digits is 67500, while the sum is 35.

The spelling of 1231055523530 in words is "one trillion, two hundred thirty-one billion, fifty-five million, five hundred twenty-three thousand, five hundred thirty".