135222473 has 2 divisors, whose sum is σ = 135222474. Its totient is φ = 135222472.

The previous prime is 135222433. The next prime is 135222491. The reversal of 135222473 is 374222531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135187129 + 35344 = 11627^2 + 188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135222473 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (135222433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67611236 + 67611237.

It is an arithmetic number, because the mean of its divisors is an integer number (67611237).

Almost surely, 2^135222473 is an apocalyptic number.

It is an amenable number.

135222473 is a deficient number, since it is larger than the sum of its proper divisors (1).

135222473 is an equidigital number, since it uses as much as digits as its factorization.

135222473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 29.

The square root of 135222473 is about 11628.5198112228. The cubic root of 135222473 is about 513.2744245194.

The spelling of 135222473 in words is "one hundred thirty-five million, two hundred twenty-two thousand, four hundred seventy-three".