1331921304 has 96 divisors (see below), whose sum is σ = 4365148320. Its totient is φ = 358161408.

The previous prime is 1331921273. The next prime is 1331921347. The reversal of 1331921304 is 4031291331.

1331921304 is a `hidden beast` number, since 1 + 331 + 9 + 21 + 304 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69159 + ... + 86294.

It is an arithmetic number, because the mean of its divisors is an integer number (45470295).

Almost surely, 2^1331921304 is an apocalyptic number.

1331921304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1331921304 is an abundant number, since it is smaller than the sum of its proper divisors (3033227016).

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

1331921304 is a wasteful number, since it uses less digits than its factorization.

1331921304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155489 (or 155482 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 1331921304 is about 36495.4970373058. The cubic root of 1331921304 is about 1100.2537442175.

The spelling of 1331921304 in words is "one billion, three hundred thirty-one million, nine hundred twenty-one thousand, three hundred four".