75234431 has 4 divisors (see below), whose sum is σ = 77267832. Its totient is φ = 73201032.

The previous prime is 75234407. The next prime is 75234463. The reversal of 75234431 is 13443257.

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: 13443257 = 1559 ⋅8623.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75234431 is a prime.

It is a super-2 number, since 2×75234431² = 11320439215787522, 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 = 75234394 and 75234403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75234491) 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, 1016645 + ... + 1016718.

It is an arithmetic number, because the mean of its divisors is an integer number (19316958).

Almost surely, 2^75234431 is an apocalyptic number.

75234431 is a deficient number, since it is larger than the sum of its proper divisors (2033401).

75234431 is a wasteful number, since it uses less digits than its factorization.

75234431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033400.

The product of its digits is 10080, while the sum is 29.

The square root of 75234431 is about 8673.7783577862. The cubic root of 75234431 is about 422.1552684410.

Adding to 75234431 its reverse (13443257), we get a palindrome (88677688).

The spelling of 75234431 in words is "seventy-five million, two hundred thirty-four thousand, four hundred thirty-one".