1231413320 has 32 divisors (see below), whose sum is σ = 2776705920. Its totient is φ = 491494080.

The previous prime is 1231413277. The next prime is 1231413349. The reversal of 1231413320 is 233141321.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1231413292 and 1231413301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14726 + ... + 51765.

It is an arithmetic number, because the mean of its divisors is an integer number (86772060).

Almost surely, 2^1231413320 is an apocalyptic number.

1231413320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231413320 is an abundant number, since it is smaller than the sum of its proper divisors (1545292600).

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

1231413320 is a wasteful number, since it uses less digits than its factorization.

1231413320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66965 (or 66961 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1231413320 is about 35091.4992555177. The cubic root of 1231413320 is about 1071.8514891357.

Adding to 1231413320 its reverse (233141321), we get a palindrome (1464554641).

The spelling of 1231413320 in words is "one billion, two hundred thirty-one million, four hundred thirteen thousand, three hundred twenty".