155287157 has 2 divisors, whose sum is σ = 155287158. Its totient is φ = 155287156.

The previous prime is 155287127. The next prime is 155287159. The reversal of 155287157 is 751782551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153412996 + 1874161 = 12386^2 + 1369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155287157 is a prime.

It is a super-2 number, since 2×155287157² = 48228202258285298, which contains 22 as substring.

Together with 155287159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155287159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77643578 + 77643579.

It is an arithmetic number, because the mean of its divisors is an integer number (77643579).

Almost surely, 2^155287157 is an apocalyptic number.

It is an amenable number.

155287157 is a deficient number, since it is larger than the sum of its proper divisors (1).

155287157 is an equidigital number, since it uses as much as digits as its factorization.

155287157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98000, while the sum is 41.

The square root of 155287157 is about 12461.4267642193. The cubic root of 155287157 is about 537.5000549486.

The spelling of 155287157 in words is "one hundred fifty-five million, two hundred eighty-seven thousand, one hundred fifty-seven".