331641540 has 72 divisors (see below), whose sum is σ = 1043253120. Its totient is φ = 88436448.

The previous prime is 331641533. The next prime is 331641581. The reversal of 331641540 is 45146133.

It is a super-2 number, since 2×331641540² = 219972222107143200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29260 + ... + 38979.

Almost surely, 2^331641540 is an apocalyptic number.

331641540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331641540 is an abundant number, since it is smaller than the sum of its proper divisors (711611580).

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

331641540 is a wasteful number, since it uses less digits than its factorization.

331641540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68263 (or 68249 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 331641540 is about 18211.0279775745. The cubic root of 331641540 is about 692.1862602403.

Adding to 331641540 its reverse (45146133), we get a palindrome (376787673).

The spelling of 331641540 in words is "three hundred thirty-one million, six hundred forty-one thousand, five hundred forty".