1213532000 has 96 divisors (see below), whose sum is σ = 3024350784. Its totient is φ = 478464000.

The previous prime is 1213531951. The next prime is 1213532027. The reversal of 1213532000 is 2353121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213532000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281864 + ... + 286136.

It is an arithmetic number, because the mean of its divisors is an integer number (31503654).

Almost surely, 2^1213532000 is an apocalyptic number.

1213532000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213532000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512175392).

1213532000 is an abundant number, since it is smaller than the sum of its proper divisors (1810818784).

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

1213532000 is an equidigital number, since it uses as much as digits as its factorization.

1213532000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4369 (or 4351 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1213532000 is about 34835.7861975297. The cubic root of 1213532000 is about 1066.6380634691.

Adding to 1213532000 its reverse (2353121), we get a palindrome (1215885121).

The spelling of 1213532000 in words is "one billion, two hundred thirteen million, five hundred thirty-two thousand".