75223431 has 16 divisors (see below), whose sum is σ = 113271520. Its totient is φ = 49325760.

The previous prime is 75223349. The next prime is 75223433. The reversal of 75223431 is 13432257.

75223431 is a `hidden beast` number, since 7 + 5 + 223 + 431 = 666.

It is not a de Polignac number, because 75223431 - 2¹¹ = 75221383 is a prime.

It is a super-2 number, since 2×75223431² = 11317129142823522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75223395 and 75223404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75223433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21190 + ... + 24483.

It is an arithmetic number, because the mean of its divisors is an integer number (7079470).

Almost surely, 2^75223431 is an apocalyptic number.

75223431 is a deficient number, since it is larger than the sum of its proper divisors (38048089).

75223431 is a wasteful number, since it uses less digits than its factorization.

75223431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45743 (or 45737 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 75223431 is about 8673.1442395477. The cubic root of 75223431 is about 422.1346930466.

Adding to 75223431 its reverse (13432257), we get a palindrome (88655688).

The spelling of 75223431 in words is "seventy-five million, two hundred twenty-three thousand, four hundred thirty-one".