1311531130 has 96 divisors (see below), whose sum is σ = 3087133056. Its totient is φ = 390583296.

The previous prime is 1311531127. The next prime is 1311531131. The reversal of 1311531130 is 311351131.

It is a super-2 number, since 2×1311531130² = 3440227809918153800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1311531098 and 1311531107.

It is not an unprimeable number, because it can be changed into a prime (1311531131) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 260497 + ... + 265483.

It is an arithmetic number, because the mean of its divisors is an integer number (32157636).

Almost surely, 2^1311531130 is an apocalyptic number.

1311531130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311531130 is an abundant number, since it is smaller than the sum of its proper divisors (1775601926).

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

1311531130 is a wasteful number, since it uses less digits than its factorization.

1311531130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5048 (or 5031 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 1311531130 is about 36215.0677204945. The cubic root of 1311531130 is about 1094.6103101005.

Adding to 1311531130 its reverse (311351131), we get a palindrome (1622882261).

The spelling of 1311531130 in words is "one billion, three hundred eleven million, five hundred thirty-one thousand, one hundred thirty".