75531331 has 4 divisors (see below), whose sum is σ = 75651664. Its totient is φ = 75411000.

The previous prime is 75531329. The next prime is 75531343. The reversal of 75531331 is 13313557.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 75531331 - 2¹ = 75531329 is a prime.

It is a super-2 number, since 2×75531331² = 11409963925263122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75531331.

It is not an unprimeable number, because it can be changed into a prime (75531301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59220 + ... + 60481.

It is an arithmetic number, because the mean of its divisors is an integer number (18912916).

Almost surely, 2^75531331 is an apocalyptic number.

75531331 is a deficient number, since it is larger than the sum of its proper divisors (120333).

75531331 is a wasteful number, since it uses less digits than its factorization.

75531331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120332.

The product of its digits is 4725, while the sum is 28.

The square root of 75531331 is about 8690.8763079450. The cubic root of 75531331 is about 422.7098610794.

Adding to 75531331 its reverse (13313557), we get a palindrome (88844888).

The spelling of 75531331 in words is "seventy-five million, five hundred thirty-one thousand, three hundred thirty-one".