75280231 has 4 divisors (see below), whose sum is σ = 81071032. Its totient is φ = 69489432.

The previous prime is 75280213. The next prime is 75280241. The reversal of 75280231 is 13208257.

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 75280231 - 2¹¹ = 75278183 is a prime.

It is a super-2 number, since 2×75280231² = 11334226358826722, 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 75280231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75280241) 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, 2895381 + ... + 2895406.

It is an arithmetic number, because the mean of its divisors is an integer number (20267758).

Almost surely, 2^75280231 is an apocalyptic number.

75280231 is a deficient number, since it is larger than the sum of its proper divisors (5790801).

75280231 is a wasteful number, since it uses less digits than its factorization.

75280231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5790800.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 75280231 is about 8676.4180973487. The cubic root of 75280231 is about 422.2409153492.

Adding to 75280231 its reverse (13208257), we get a palindrome (88488488).

The spelling of 75280231 in words is "seventy-five million, two hundred eighty thousand, two hundred thirty-one".