75047031 has 6 divisors (see below), whose sum is σ = 108401280. Its totient is φ = 50031348.

The previous prime is 75047009. The next prime is 75047051. The reversal of 75047031 is 13074057.

It is not a de Polignac number, because 75047031 - 2¹⁵ = 75014263 is a prime.

It is a super-2 number, since 2×75047031² = 11264113723829922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 75046986 and 75047004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75047051) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 4169271 + ... + 4169288.

It is an arithmetic number, because the mean of its divisors is an integer number (18066880).

Almost surely, 2^75047031 is an apocalyptic number.

75047031 is a deficient number, since it is larger than the sum of its proper divisors (33354249).

75047031 is a wasteful number, since it uses less digits than its factorization.

75047031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8338565 (or 8338562 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 75047031 is about 8662.9689483456. The cubic root of 75047031 is about 421.8044641909.

It can be divided in two parts, 7504 and 7031, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 75047031 in words is "seventy-five million, forty-seven thousand, thirty-one".