155229271 has 2 divisors, whose sum is σ = 155229272. Its totient is φ = 155229270.

The previous prime is 155229251. The next prime is 155229281. The reversal of 155229271 is 172922551.

It is a strong prime.

It is an emirp because it is prime and its reverse (172922551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155229271 - 2¹¹ = 155227223 is a prime.

It is a super-2 number, since 2×155229271² = 48192253150382882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155229211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77614635 + 77614636.

It is an arithmetic number, because the mean of its divisors is an integer number (77614636).

Almost surely, 2^155229271 is an apocalyptic number.

155229271 is a deficient number, since it is larger than the sum of its proper divisors (1).

155229271 is an equidigital number, since it uses as much as digits as its factorization.

155229271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 34.

The square root of 155229271 is about 12459.1039404927. The cubic root of 155229271 is about 537.4332591370.

The spelling of 155229271 in words is "one hundred fifty-five million, two hundred twenty-nine thousand, two hundred seventy-one".