1213243530 has 32 divisors (see below), whose sum is σ = 2913033024. Its totient is φ = 323392896.

The previous prime is 1213243517. The next prime is 1213243541. The reversal of 1213243530 is 353423121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213243530.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76029 + ... + 90591.

It is an arithmetic number, because the mean of its divisors is an integer number (91032282).

Almost surely, 2^1213243530 is an apocalyptic number.

1213243530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213243530 is an abundant number, since it is smaller than the sum of its proper divisors (1699789494).

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

1213243530 is a wasteful number, since it uses less digits than its factorization.

1213243530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17350.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 1213243530 is about 34831.6455252978. The cubic root of 1213243530 is about 1066.5535395433.

Adding to 1213243530 its reverse (353423121), we get a palindrome (1566666651).

The spelling of 1213243530 in words is "one billion, two hundred thirteen million, two hundred forty-three thousand, five hundred thirty".