75303131 has 4 divisors (see below), whose sum is σ = 75502200. Its totient is φ = 75104064.

The previous prime is 75303121. The next prime is 75303133. The reversal of 75303131 is 13130357.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13130357 = 139 ⋅94463.

It is a cyclic number.

It is not a de Polignac number, because 75303131 - 2¹⁰ = 75302107 is a prime.

It is a super-2 number, since 2×75303131² = 11341123076806322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75303097 and 75303106.

It is not an unprimeable number, because it can be changed into a prime (75303133) 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, 98966 + ... + 99723.

It is an arithmetic number, because the mean of its divisors is an integer number (18875550).

Almost surely, 2^75303131 is an apocalyptic number.

75303131 is a deficient number, since it is larger than the sum of its proper divisors (199069).

75303131 is a wasteful number, since it uses less digits than its factorization.

75303131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199068.

The product of its (nonzero) digits is 945, while the sum is 23.

The square root of 75303131 is about 8677.7376660049. The cubic root of 75303131 is about 422.2837257769.

Adding to 75303131 its reverse (13130357), we get a palindrome (88433488).

The spelling of 75303131 in words is "seventy-five million, three hundred three thousand, one hundred thirty-one".