155221464 has 32 divisors (see below), whose sum is σ = 400573440. Its totient is φ = 50071200.

The previous prime is 155221459. The next prime is 155221481. The reversal of 155221464 is 464122551.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 103572 + ... + 105059.

It is an arithmetic number, because the mean of its divisors is an integer number (12517920).

Almost surely, 2^155221464 is an apocalyptic number.

It is an amenable number.

155221464 is an abundant number, since it is smaller than the sum of its proper divisors (245351976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155221464 is a wasteful number, since it uses less digits than its factorization.

155221464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208671 (or 208667 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 155221464 is about 12458.7906315180. The cubic root of 155221464 is about 537.4242492130.

The spelling of 155221464 in words is "one hundred fifty-five million, two hundred twenty-one thousand, four hundred sixty-four".