1213305000 has 160 divisors (see below), whose sum is σ = 3873260160. Its totient is φ = 316480000.

The previous prime is 1213304971. The next prime is 1213305019. The reversal of 1213305000 is 5033121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 704140 + ... + 705860.

It is an arithmetic number, because the mean of its divisors is an integer number (24207876).

Almost surely, 2^1213305000 is an apocalyptic number.

1213305000 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 1213305000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1936630080).

1213305000 is an abundant number, since it is smaller than the sum of its proper divisors (2659955160).

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

1213305000 is a wasteful number, since it uses less digits than its factorization.

1213305000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797 (or 1778 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1213305000 is about 34832.5279013740. The cubic root of 1213305000 is about 1066.5715518487.

Adding to 1213305000 its reverse (5033121), we get a palindrome (1218338121).

The spelling of 1213305000 in words is "one billion, two hundred thirteen million, three hundred five thousand".