155230529 has 2 divisors, whose sum is σ = 155230530. Its totient is φ = 155230528.

The previous prime is 155230511. The next prime is 155230531. The reversal of 155230529 is 925032551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154132225 + 1098304 = 12415^2 + 1048^2 .

It is an emirp because it is prime and its reverse (925032551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155230529 is a prime.

Together with 155230531, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 155230495 and 155230504.

It is not a weakly prime, because it can be changed into another prime (155230549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77615264 + 77615265.

It is an arithmetic number, because the mean of its divisors is an integer number (77615265).

Almost surely, 2^155230529 is an apocalyptic number.

It is an amenable number.

155230529 is a deficient number, since it is larger than the sum of its proper divisors (1).

155230529 is an equidigital number, since it uses as much as digits as its factorization.

155230529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 155230529 is about 12459.1544255620. The cubic root of 155230529 is about 537.4347109449.

The spelling of 155230529 in words is "one hundred fifty-five million, two hundred thirty thousand, five hundred twenty-nine".