75151231 has 2 divisors, whose sum is σ = 75151232. Its totient is φ = 75151230.

The previous prime is 75151201. The next prime is 75151243. The reversal of 75151231 is 13215157.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75151231 - 2⁷ = 75151103 is a prime.

It is a super-2 number, since 2×75151231² = 11295415041630722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 75151196 and 75151205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75151201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37575615 + 37575616.

It is an arithmetic number, because the mean of its divisors is an integer number (37575616).

Almost surely, 2^75151231 is an apocalyptic number.

75151231 is a deficient number, since it is larger than the sum of its proper divisors (1).

75151231 is an equidigital number, since it uses as much as digits as its factorization.

75151231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1050, while the sum is 25.

The square root of 75151231 is about 8668.9809666419. The cubic root of 75151231 is about 421.9995938242. Note that the first 3 decimals are identical.

Adding to 75151231 its reverse (13215157), we get a palindrome (88366388).

The spelling of 75151231 in words is "seventy-five million, one hundred fifty-one thousand, two hundred thirty-one".