75331540 has 12 divisors (see below), whose sum is σ = 158196276. Its totient is φ = 30132608.

The previous prime is 75331513. The next prime is 75331541. The reversal of 75331540 is 4513357.

It can be written as a sum of positive squares in 2 ways, for example, as 25120144 + 50211396 = 5012^2 + 7086^2 .

It is a junction number, because it is equal to n+sod(n) for n = 75331499 and 75331508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75331541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1883269 + ... + 1883308.

It is an arithmetic number, because the mean of its divisors is an integer number (13183023).

Almost surely, 2^75331540 is an apocalyptic number.

It is an amenable number.

75331540 is an abundant number, since it is smaller than the sum of its proper divisors (82864736).

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

75331540 is a wasteful number, since it uses less digits than its factorization.

75331540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3766586 (or 3766584 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 75331540 is about 8679.3744014186. The cubic root of 75331540 is about 422.3368229496.

Adding to 75331540 its reverse (4513357), we get a palindrome (79844897).

The spelling of 75331540 in words is "seventy-five million, three hundred thirty-one thousand, five hundred forty".