331552385 has 16 divisors (see below), whose sum is σ = 408136080. Its totient is φ = 258474240.

The previous prime is 331552373. The next prime is 331552387. The reversal of 331552385 is 583255133.

It can be written as a sum of positive squares in 8 ways, for example, as 72471169 + 259081216 = 8513^2 + 16096^2 .

It is not a de Polignac number, because 331552385 - 2⁴ = 331552369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (331552387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28259 + ... + 38231.

It is an arithmetic number, because the mean of its divisors is an integer number (25508505).

Almost surely, 2^331552385 is an apocalyptic number.

It is an amenable number.

331552385 is a deficient number, since it is larger than the sum of its proper divisors (76583695).

331552385 is a wasteful number, since it uses less digits than its factorization.

331552385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10148.

The product of its digits is 54000, while the sum is 35.

The square root of 331552385 is about 18208.5799830739. The cubic root of 331552385 is about 692.1242280063.

The spelling of 331552385 in words is "three hundred thirty-one million, five hundred fifty-two thousand, three hundred eighty-five".