75122231 has 2 divisors, whose sum is σ = 75122232. Its totient is φ = 75122230.

The previous prime is 75122197. The next prime is 75122237. The reversal of 75122231 is 13222157.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75122231 - 2¹⁸ = 74860087 is a prime.

It is a super-2 number, since 2×75122231² = 11286699180834722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 75122197 and 75122206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75122237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37561115 + 37561116.

It is an arithmetic number, because the mean of its divisors is an integer number (37561116).

Almost surely, 2^75122231 is an apocalyptic number.

75122231 is a deficient number, since it is larger than the sum of its proper divisors (1).

75122231 is an equidigital number, since it uses as much as digits as its factorization.

75122231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 23.

The square root of 75122231 is about 8667.3081749757. The cubic root of 75122231 is about 421.9453052359.

Adding to 75122231 its reverse (13222157), we get a palindrome (88344388).

The spelling of 75122231 in words is "seventy-five million, one hundred twenty-two thousand, two hundred thirty-one".