155125231 has 2 divisors, whose sum is σ = 155125232. Its totient is φ = 155125230.

The previous prime is 155125211. The next prime is 155125247. The reversal of 155125231 is 132521551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155125231 - 2⁵ = 155125199 is a prime.

It is a super-2 number, since 2×155125231² = 48127674585606722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155125196 and 155125205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155125211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77562615 + 77562616.

It is an arithmetic number, because the mean of its divisors is an integer number (77562616).

Almost surely, 2^155125231 is an apocalyptic number.

155125231 is a deficient number, since it is larger than the sum of its proper divisors (1).

155125231 is an equidigital number, since it uses as much as digits as its factorization.

155125231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1500, while the sum is 25.

The square root of 155125231 is about 12454.9279805224. The cubic root of 155125231 is about 537.3131635465.

Adding to 155125231 its reverse (132521551), we get a palindrome (287646782).

The spelling of 155125231 in words is "one hundred fifty-five million, one hundred twenty-five thousand, two hundred thirty-one".