1213531300 has 18 divisors (see below), whose sum is σ = 2633363138. Its totient is φ = 485412480.

The previous prime is 1213531259. The next prime is 1213531321. The reversal of 1213531300 is 31353121.

It can be written as a sum of positive squares in 3 ways, for example, as 8608356 + 1204922944 = 2934^2 + 34712^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6067557 + ... + 6067756.

Almost surely, 2^1213531300 is an apocalyptic number.

1213531300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213531300 is an abundant number, since it is smaller than the sum of its proper divisors (1419831838).

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

1213531300 is a wasteful number, since it uses less digits than its factorization.

1213531300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12135327 (or 12135320 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 1213531300 is about 34835.7761503888. The cubic root of 1213531300 is about 1066.6378583799.

Adding to 1213531300 its reverse (31353121), we get a palindrome (1244884421).

The spelling of 1213531300 in words is "one billion, two hundred thirteen million, five hundred thirty-one thousand, three hundred".