331478577 has 12 divisors (see below), whose sum is σ = 479037364. Its totient is φ = 220877280.

The previous prime is 331478561. The next prime is 331478603. The reversal of 331478577 is 775874133.

331478577 is a `hidden beast` number, since 3 + 3 + 1 + 4 + 78 + 577 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 116445681 + 215032896 = 10791^2 + 14664^2 .

It is not a de Polignac number, because 331478577 - 2⁴ = 331478561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331478527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13203 + ... + 28935.

Almost surely, 2^331478577 is an apocalyptic number.

It is an amenable number.

331478577 is a deficient number, since it is larger than the sum of its proper divisors (147558787).

331478577 is a wasteful number, since it uses less digits than its factorization.

331478577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18080 (or 18077 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 331478577 is about 18206.5531334187. The cubic root of 331478577 is about 692.0728654881.

The spelling of 331478577 in words is "three hundred thirty-one million, four hundred seventy-eight thousand, five hundred seventy-seven".