155336231 has 2 divisors, whose sum is σ = 155336232. Its totient is φ = 155336230.

The previous prime is 155336221. The next prime is 155336281. The reversal of 155336231 is 132633551.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155336231 is a prime.

It is a super-2 number, since 2×155336231² = 48258689322570722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 155336194 and 155336203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155336201) 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, 77668115 + 77668116.

It is an arithmetic number, because the mean of its divisors is an integer number (77668116).

Almost surely, 2^155336231 is an apocalyptic number.

155336231 is a deficient number, since it is larger than the sum of its proper divisors (1).

155336231 is an equidigital number, since it uses as much as digits as its factorization.

155336231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 29.

The square root of 155336231 is about 12463.3956448474. The cubic root of 155336231 is about 537.5566694172.

Adding to 155336231 its reverse (132633551), we get a palindrome (287969782).

The spelling of 155336231 in words is "one hundred fifty-five million, three hundred thirty-six thousand, two hundred thirty-one".