1343131220 has 24 divisors (see below), whose sum is σ = 2880589824. Its totient is φ = 525821216.

The previous prime is 1343131217. The next prime is 1343131243. The reversal of 1343131220 is 221313431.

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 = 1343131192 and 1343131201.

It is a congruent number.

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, 713492 + ... + 715371.

It is an arithmetic number, because the mean of its divisors is an integer number (120024576).

Almost surely, 2^1343131220 is an apocalyptic number.

1343131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1343131220 is an abundant number, since it is smaller than the sum of its proper divisors (1537458604).

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

1343131220 is a wasteful number, since it uses less digits than its factorization.

1343131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428919 (or 1428917 counting only the distinct ones).

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

The square root of 1343131220 is about 36648.7546855279. The cubic root of 1343131220 is about 1103.3318317832.

Adding to 1343131220 its reverse (221313431), we get a palindrome (1564444651).

The spelling of 1343131220 in words is "one billion, three hundred forty-three million, one hundred thirty-one thousand, two hundred twenty".