331520465 has 16 divisors (see below), whose sum is σ = 409646160. Its totient is φ = 257402880.

The previous prime is 331520443. The next prime is 331520477. The reversal of 331520465 is 564025133.

It can be written as a sum of positive squares in 8 ways, for example, as 27331984 + 304188481 = 5228^2 + 17441^2 .

It is a de Polignac number, because none of the positive numbers 2^k-331520465 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36281 + ... + 44489.

It is an arithmetic number, because the mean of its divisors is an integer number (25602885).

Almost surely, 2^331520465 is an apocalyptic number.

It is an amenable number.

331520465 is a deficient number, since it is larger than the sum of its proper divisors (78125695).

331520465 is a wasteful number, since it uses less digits than its factorization.

331520465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8452.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 331520465 is about 18207.7034521106. The cubic root of 331520465 is about 692.1020160167.

Adding to 331520465 its reverse (564025133), we get a palindrome (895545598).

The spelling of 331520465 in words is "three hundred thirty-one million, five hundred twenty thousand, four hundred sixty-five".