75226409 has 2 divisors, whose sum is σ = 75226410. Its totient is φ = 75226408.

The previous prime is 75226391. The next prime is 75226423. The reversal of 75226409 is 90462257.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48930025 + 26296384 = 6995^2 + 5128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75226409 is a prime.

It is a super-2 number, since 2×75226409² = 11318025222070562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75226009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37613204 + 37613205.

It is an arithmetic number, because the mean of its divisors is an integer number (37613205).

Almost surely, 2^75226409 is an apocalyptic number.

It is an amenable number.

75226409 is a deficient number, since it is larger than the sum of its proper divisors (1).

75226409 is an equidigital number, since it uses as much as digits as its factorization.

75226409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 75226409 is about 8673.3159172257. The cubic root of 75226409 is about 422.1402635650.

It can be divided in two parts, 7522 and 6409, that added together give a palindrome (13931).

The spelling of 75226409 in words is "seventy-five million, two hundred twenty-six thousand, four hundred nine".