155147481 has 12 divisors (see below), whose sum is σ = 232402352. Its totient is φ = 103431492.

The previous prime is 155147471. The next prime is 155147497. The reversal of 155147481 is 184741551.

It is not a de Polignac number, because 155147481 - 2⁵ = 155147449 is a prime.

It is a super-2 number, since 2×155147481² = 48141481721290722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155147441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 318991 + ... + 319476.

Almost surely, 2^155147481 is an apocalyptic number.

It is an amenable number.

155147481 is a deficient number, since it is larger than the sum of its proper divisors (77254871).

155147481 is an frugal number, since it uses more digits than its factorization.

155147481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638482 (or 638470 counting only the distinct ones).

The product of its digits is 22400, while the sum is 36.

The square root of 155147481 is about 12455.8211692365. The cubic root of 155147481 is about 537.3388517089.

The spelling of 155147481 in words is "one hundred fifty-five million, one hundred forty-seven thousand, four hundred eighty-one".