75381331 has 2 divisors, whose sum is σ = 75381332. Its totient is φ = 75381330.

The previous prime is 75381311. The next prime is 75381343. The reversal of 75381331 is 13318357.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75381331 is a prime.

It is a super-2 number, since 2×75381331² = 11364690126663122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 75381293 and 75381302.

It is not a weakly prime, because it can be changed into another prime (75381301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37690665 + 37690666.

It is an arithmetic number, because the mean of its divisors is an integer number (37690666).

Almost surely, 2^75381331 is an apocalyptic number.

75381331 is a deficient number, since it is larger than the sum of its proper divisors (1).

75381331 is an equidigital number, since it uses as much as digits as its factorization.

75381331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 75381331 is about 8682.2422795036. The cubic root of 75381331 is about 422.4298514538.

Adding to 75381331 its reverse (13318357), we get a palindrome (88699688).

The spelling of 75381331 in words is "seventy-five million, three hundred eighty-one thousand, three hundred thirty-one".