155745447 has 16 divisors (see below), whose sum is σ = 243965568. Its totient is φ = 87130080.

The previous prime is 155745439. The next prime is 155745463. The reversal of 155745447 is 744547551.

155745447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155745447 - 2³ = 155745439 is a prime.

It is a super-3 number, since 3×155745447³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 155745399 and 155745408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155745407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181093 + ... + 181950.

It is an arithmetic number, because the mean of its divisors is an integer number (15247848).

Almost surely, 2^155745447 is an apocalyptic number.

155745447 is a deficient number, since it is larger than the sum of its proper divisors (88220121).

155745447 is a wasteful number, since it uses less digits than its factorization.

155745447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363070.

The product of its digits is 392000, while the sum is 42.

The square root of 155745447 is about 12479.8015609224. The cubic root of 155745447 is about 538.0282998984.

The spelling of 155745447 in words is "one hundred fifty-five million, seven hundred forty-five thousand, four hundred forty-seven".