155315447 has 12 divisors (see below), whose sum is σ = 183373560. Its totient is φ = 131137776.

The previous prime is 155315437. The next prime is 155315453. The reversal of 155315447 is 744513551.

It is a happy number.

It is not a de Polignac number, because 155315447 - 2⁴ = 155315431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155315437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20372 + ... + 26937.

It is an arithmetic number, because the mean of its divisors is an integer number (15281130).

Almost surely, 2^155315447 is an apocalyptic number.

155315447 is a deficient number, since it is larger than the sum of its proper divisors (28058113).

155315447 is an equidigital number, since it uses as much as digits as its factorization.

155315447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47390 (or 47383 counting only the distinct ones).

The product of its digits is 42000, while the sum is 35.

The square root of 155315447 is about 12462.5618152930. The cubic root of 155315447 is about 537.5326933062.

Adding to 155315447 its reverse (744513551), we get a palindrome (899828998).

The spelling of 155315447 in words is "one hundred fifty-five million, three hundred fifteen thousand, four hundred forty-seven".