155224133 has 2 divisors, whose sum is σ = 155224134. Its totient is φ = 155224132.

The previous prime is 155224123. The next prime is 155224141. The reversal of 155224133 is 331422551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146361604 + 8862529 = 12098^2 + 2977^2 .

It is a cyclic number.

It is not a de Polignac number, because 155224133 - 2⁴ = 155224117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_8721431 and since 155224133 and 8721431 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155224123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77612066 + 77612067.

It is an arithmetic number, because the mean of its divisors is an integer number (77612067).

Almost surely, 2^155224133 is an apocalyptic number.

It is an amenable number.

155224133 is a deficient number, since it is larger than the sum of its proper divisors (1).

155224133 is an equidigital number, since it uses as much as digits as its factorization.

155224133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 155224133 is about 12458.8977441827. The cubic root of 155224133 is about 537.4273294939.

Adding to 155224133 its reverse (331422551), we get a palindrome (486646684).

The spelling of 155224133 in words is "one hundred fifty-five million, two hundred twenty-four thousand, one hundred thirty-three".