75323431 has 2 divisors, whose sum is σ = 75323432. Its totient is φ = 75323430.

The previous prime is 75323407. The next prime is 75323449. The reversal of 75323431 is 13432357.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75323431 - 2¹¹ = 75321383 is a prime.

It is a super-2 number, since 2×75323431² = 11347238515223522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 75323431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75323491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37661715 + 37661716.

It is an arithmetic number, because the mean of its divisors is an integer number (37661716).

Almost surely, 2^75323431 is an apocalyptic number.

75323431 is a deficient number, since it is larger than the sum of its proper divisors (1).

75323431 is an equidigital number, since it uses as much as digits as its factorization.

75323431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 28.

The square root of 75323431 is about 8678.9072468831. The cubic root of 75323431 is about 422.3216683756.

Adding to 75323431 its reverse (13432357), we get a palindrome (88755788).

The spelling of 75323431 in words is "seventy-five million, three hundred twenty-three thousand, four hundred thirty-one".