155421484 has 12 divisors (see below), whose sum is σ = 275265144. Its totient is φ = 76774304.

The previous prime is 155421439. The next prime is 155421491. The reversal of 155421484 is 484124551.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233737 + ... + 234400.

It is an arithmetic number, because the mean of its divisors is an integer number (22938762).

Almost surely, 2^155421484 is an apocalyptic number.

It is an amenable number.

155421484 is a deficient number, since it is larger than the sum of its proper divisors (119843660).

155421484 is a wasteful number, since it uses less digits than its factorization.

155421484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468224 (or 468222 counting only the distinct ones).

The product of its digits is 25600, while the sum is 34.

The square root of 155421484 is about 12466.8153110568. The cubic root of 155421484 is about 537.6549936287.

The spelling of 155421484 in words is "one hundred fifty-five million, four hundred twenty-one thousand, four hundred eighty-four".