155214251 has 2 divisors, whose sum is σ = 155214252. Its totient is φ = 155214250.

The previous prime is 155214239. The next prime is 155214253. The reversal of 155214251 is 152412551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155214251 - 2⁶ = 155214187 is a prime.

Together with 155214253, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155214251.

It is not a weakly prime, because it can be changed into another prime (155214253) 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, 77607125 + 77607126.

It is an arithmetic number, because the mean of its divisors is an integer number (77607126).

Almost surely, 2^155214251 is an apocalyptic number.

155214251 is a deficient number, since it is larger than the sum of its proper divisors (1).

155214251 is an equidigital number, since it uses as much as digits as its factorization.

155214251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2000, while the sum is 26.

The square root of 155214251 is about 12458.5011538307. The cubic root of 155214251 is about 537.4159245457.

The spelling of 155214251 in words is "one hundred fifty-five million, two hundred fourteen thousand, two hundred fifty-one".