75542231 has 4 divisors (see below), whose sum is σ = 75655152. Its totient is φ = 75429312.

The previous prime is 75542227. The next prime is 75542239. The reversal of 75542231 is 13224557.

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: 13224557 = 827 ⋅15991.

It is a cyclic number.

It is not a de Polignac number, because 75542231 - 2² = 75542227 is a prime.

It is a super-2 number, since 2×75542231² = 11413257328914722, 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 = 75542194 and 75542203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75542239) 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 3 ways as a sum of consecutive naturals, for example, 55451 + ... + 56796.

It is an arithmetic number, because the mean of its divisors is an integer number (18913788).

Almost surely, 2^75542231 is an apocalyptic number.

75542231 is a deficient number, since it is larger than the sum of its proper divisors (112921).

75542231 is a wasteful number, since it uses less digits than its factorization.

75542231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112920.

The product of its digits is 8400, while the sum is 29.

The square root of 75542231 is about 8691.5033797382. The cubic root of 75542231 is about 422.7301939921.

Adding to 75542231 its reverse (13224557), we get a palindrome (88766788).

The spelling of 75542231 in words is "seventy-five million, five hundred forty-two thousand, two hundred thirty-one".