155230447 has 2 divisors, whose sum is σ = 155230448. Its totient is φ = 155230446.

The previous prime is 155230433. The next prime is 155230457. The reversal of 155230447 is 744032551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155230447 - 2⁷ = 155230319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155230457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77615223 + 77615224.

It is an arithmetic number, because the mean of its divisors is an integer number (77615224).

Almost surely, 2^155230447 is an apocalyptic number.

155230447 is a deficient number, since it is larger than the sum of its proper divisors (1).

155230447 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 9 representation: 155230447 = (354075124)₉.

155230447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 155230447 is about 12459.1511348085. The cubic root of 155230447 is about 537.4346163122.

Adding to 155230447 its reverse (744032551), we get a palindrome (899262998).

The spelling of 155230447 in words is "one hundred fifty-five million, two hundred thirty thousand, four hundred forty-seven".