1231514320 has 20 divisors (see below), whose sum is σ = 2863270980. Its totient is φ = 492605696.

The previous prime is 1231514309. The next prime is 1231514321. The reversal of 1231514320 is 234151321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 470195856 + 761318464 = 21684^2 + 27592^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 1231514291 and 1231514300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231514321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7696885 + ... + 7697044.

It is an arithmetic number, because the mean of its divisors is an integer number (143163549).

Almost surely, 2^1231514320 is an apocalyptic number.

1231514320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231514320 is an abundant number, since it is smaller than the sum of its proper divisors (1631756660).

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

1231514320 is a wasteful number, since it uses less digits than its factorization.

1231514320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15393942 (or 15393936 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1231514320 is about 35092.9383209785. The cubic root of 1231514320 is about 1071.8807926033.

Adding to 1231514320 its reverse (234151321), we get a palindrome (1465665641).

The spelling of 1231514320 in words is "one billion, two hundred thirty-one million, five hundred fourteen thousand, three hundred twenty".