155533253 has 2 divisors, whose sum is σ = 155533254. Its totient is φ = 155533252.

The previous prime is 155533241. The next prime is 155533283. The reversal of 155533253 is 352335551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150234049 + 5299204 = 12257^2 + 2302^2 .

It is a cyclic number.

It is not a de Polignac number, because 155533253 - 2²⁰ = 154484677 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155533283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77766626 + 77766627.

It is an arithmetic number, because the mean of its divisors is an integer number (77766627).

Almost surely, 2^155533253 is an apocalyptic number.

It is an amenable number.

155533253 is a deficient number, since it is larger than the sum of its proper divisors (1).

155533253 is an equidigital number, since it uses as much as digits as its factorization.

155533253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33750, while the sum is 32.

The square root of 155533253 is about 12471.2971658926. The cubic root of 155533253 is about 537.7838448878.

The spelling of 155533253 in words is "one hundred fifty-five million, five hundred thirty-three thousand, two hundred fifty-three".