75181313 has 4 divisors (see below), whose sum is σ = 76211268. Its totient is φ = 74151360.

The previous prime is 75181297. The next prime is 75181343. The reversal of 75181313 is 31318157.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40806544 + 34374769 = 6388^2 + 5863^2 .

It is a cyclic number.

It is not a de Polignac number, because 75181313 - 2⁴ = 75181297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75181343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514868 + ... + 515013.

It is an arithmetic number, because the mean of its divisors is an integer number (19052817).

Almost surely, 2^75181313 is an apocalyptic number.

75181313 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

75181313 is a deficient number, since it is larger than the sum of its proper divisors (1029955).

75181313 is a wasteful number, since it uses less digits than its factorization.

75181313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029954.

The product of its digits is 2520, while the sum is 29.

The square root of 75181313 is about 8670.7158297340. The cubic root of 75181313 is about 422.0558931830.

The spelling of 75181313 in words is "seventy-five million, one hundred eighty-one thousand, three hundred thirteen".