1331396356 has 6 divisors (see below), whose sum is σ = 2329943630. Its totient is φ = 665698176.

The previous prime is 1331396323. The next prime is 1331396357. The reversal of 1331396356 is 6536931331.

It can be written as a sum of positive squares in only one way, i.e., 715562500 + 615833856 = 26750^2 + 24816^2 .

It is not an unprimeable number, because it can be changed into a prime (1331396357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166424541 + ... + 166424548.

Almost surely, 2^1331396356 is an apocalyptic number.

It is an amenable number.

1331396356 is a deficient number, since it is larger than the sum of its proper divisors (998547274).

1331396356 is a wasteful number, since it uses less digits than its factorization.

1331396356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332849093 (or 332849091 counting only the distinct ones).

The product of its digits is 131220, while the sum is 40.

The square root of 1331396356 is about 36488.3043727713. The cubic root of 1331396356 is about 1100.1091781441.

The spelling of 1331396356 in words is "one billion, three hundred thirty-one million, three hundred ninety-six thousand, three hundred fifty-six".