1213500530 has 24 divisors (see below), whose sum is σ = 2400928236. Its totient is φ = 441272480.

The previous prime is 1213500527. The next prime is 1213500601. The reversal of 1213500530 is 350053121.

It can be written as a sum of positive squares in 2 ways, for example, as 1145619409 + 67881121 = 33847^2 + 8239^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 500237 + ... + 502656.

Almost surely, 2^1213500530 is an apocalyptic number.

1213500530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213500530 is a deficient number, since it is larger than the sum of its proper divisors (1187427706).

1213500530 is a wasteful number, since it uses less digits than its factorization.

1213500530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002922 (or 1002911 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 1213500530 is about 34835.3345039200. The cubic root of 1213500530 is about 1066.6288431684.

Adding to 1213500530 its reverse (350053121), we get a palindrome (1563553651).

The spelling of 1213500530 in words is "one billion, two hundred thirteen million, five hundred thousand, five hundred thirty".