155251 has 2 divisors, whose sum is σ = 155252. Its totient is φ = 155250.

The previous prime is 155231. The next prime is 155269. The reversal of 155251 is 152551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155251 - 2⁵ = 155219 is a prime.

It is not a weakly prime, because it can be changed into another prime (155201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77625 + 77626.

It is an arithmetic number, because the mean of its divisors is an integer number (77626).

2¹⁵⁵²⁵¹ is an apocalyptic number.

155251 is a deficient number, since it is larger than the sum of its proper divisors (1).

155251 is an equidigital number, since it uses as much as digits as its factorization.

155251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250, while the sum is 19.

The square root of 155251 is about 394.0190350732. The cubic root of 155251 is about 53.7458334611.

It can be divided in two parts, 155 and 251, that added together give a triangular number (406 = T₂₈).

The spelling of 155251 in words is "one hundred fifty-five thousand, two hundred fifty-one".