155481747 has 4 divisors (see below), whose sum is σ = 207309000. Its totient is φ = 103654496.

The previous prime is 155481737. The next prime is 155481749. The reversal of 155481747 is 747184551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155481747 - 2¹⁰ = 155480723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155481699 and 155481708.

It is not an unprimeable number, because it can be changed into a prime (155481749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25913622 + ... + 25913627.

It is an arithmetic number, because the mean of its divisors is an integer number (51827250).

Almost surely, 2^155481747 is an apocalyptic number.

155481747 is a deficient number, since it is larger than the sum of its proper divisors (51827253).

155481747 is an equidigital number, since it uses as much as digits as its factorization.

155481747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51827252.

The product of its digits is 156800, while the sum is 42.

The square root of 155481747 is about 12469.2320132396. The cubic root of 155481747 is about 537.7244746195.

The spelling of 155481747 in words is "one hundred fifty-five million, four hundred eighty-one thousand, seven hundred forty-seven".