1310231240 has 32 divisors (see below), whose sum is σ = 2963002680. Its totient is φ = 521428992.

The previous prime is 1310231239. The next prime is 1310231249. The reversal of 1310231240 is 421320131.

It can be written as a sum of positive squares in 4 ways, for example, as 1272063556 + 38167684 = 35666^2 + 6178^2 .

It is not an unprimeable number, because it can be changed into a prime (1310231249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75257 + ... + 91016.

Almost surely, 2^1310231240 is an apocalyptic number.

1310231240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1310231240 is an abundant number, since it is smaller than the sum of its proper divisors (1652771440).

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

1310231240 is a wasteful number, since it uses less digits than its factorization.

1310231240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166481 (or 166477 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1310231240 is about 36197.1164597403. The cubic root of 1310231240 is about 1094.2485590388.

Adding to 1310231240 its reverse (421320131), we get a palindrome (1731551371).

The spelling of 1310231240 in words is "one billion, three hundred ten million, two hundred thirty-one thousand, two hundred forty".