155378922 has 16 divisors (see below), whose sum is σ = 327113760. Its totient is φ = 49066992.

The previous prime is 155378879. The next prime is 155378933. The reversal of 155378922 is 229873551.

It is a happy 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, 681373 + ... + 681600.

It is an arithmetic number, because the mean of its divisors is an integer number (20444610).

Almost surely, 2^155378922 is an apocalyptic number.

155378922 is an abundant number, since it is smaller than the sum of its proper divisors (171734838).

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

155378922 is a wasteful number, since it uses less digits than its factorization.

155378922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362997.

The product of its digits is 151200, while the sum is 42.

The square root of 155378922 is about 12465.1081824427. The cubic root of 155378922 is about 537.6059104079.

The spelling of 155378922 in words is "one hundred fifty-five million, three hundred seventy-eight thousand, nine hundred twenty-two".