1311253530 has 32 divisors (see below), whose sum is σ = 3148200000. Its totient is φ = 349535232.

The previous prime is 1311253523. The next prime is 1311253547. The reversal of 1311253530 is 353521131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311253530.

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, 92346 + ... + 105594.

It is an arithmetic number, because the mean of its divisors is an integer number (98381250).

Almost surely, 2^1311253530 is an apocalyptic number.

1311253530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311253530 is an abundant number, since it is smaller than the sum of its proper divisors (1836946470).

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

1311253530 is a wasteful number, since it uses less digits than its factorization.

1311253530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16558.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 1311253530 is about 36211.2348588114. The cubic root of 1311253530 is about 1094.5330758775.

Adding to 1311253530 its reverse (353521131), we get a palindrome (1664774661).

The spelling of 1311253530 in words is "one billion, three hundred eleven million, two hundred fifty-three thousand, five hundred thirty".