155890253 has 2 divisors, whose sum is σ = 155890254. Its totient is φ = 155890252.

The previous prime is 155890247. The next prime is 155890271. The reversal of 155890253 is 352098551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134977924 + 20912329 = 11618^2 + 4573^2 .

It is a cyclic number.

It is not a de Polignac number, because 155890253 - 2²² = 151695949 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 (155890453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77945126 + 77945127.

It is an arithmetic number, because the mean of its divisors is an integer number (77945127).

Almost surely, 2^155890253 is an apocalyptic number.

It is an amenable number.

155890253 is a deficient number, since it is larger than the sum of its proper divisors (1).

155890253 is an equidigital number, since it uses as much as digits as its factorization.

155890253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 38.

The square root of 155890253 is about 12485.6018277054. The cubic root of 155890253 is about 538.1949941082.

The spelling of 155890253 in words is "one hundred fifty-five million, eight hundred ninety thousand, two hundred fifty-three".