155230549 has 2 divisors, whose sum is σ = 155230550. Its totient is φ = 155230548.

The previous prime is 155230541. The next prime is 155230583. The reversal of 155230549 is 945032551.

It is an a-pointer prime, because the next prime (155230583) can be obtained adding 155230549 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143568324 + 11662225 = 11982^2 + 3415^2 .

It is a cyclic number.

It is not a de Polignac number, because 155230549 - 2³ = 155230541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155230541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77615274 + 77615275.

It is an arithmetic number, because the mean of its divisors is an integer number (77615275).

Almost surely, 2^155230549 is an apocalyptic number.

It is an amenable number.

155230549 is a deficient number, since it is larger than the sum of its proper divisors (1).

155230549 is an equidigital number, since it uses as much as digits as its factorization.

155230549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 155230549 is about 12459.1552281846. The cubic root of 155230549 is about 537.4347340260.

The spelling of 155230549 in words is "one hundred fifty-five million, two hundred thirty thousand, five hundred forty-nine".