155219394 has 32 divisors (see below), whose sum is σ = 339655680. Its totient is φ = 46898000.

The previous prime is 155219381. The next prime is 155219413. The reversal of 155219394 is 493912551.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20419 + ... + 26969.

It is an arithmetic number, because the mean of its divisors is an integer number (10614240).

Almost surely, 2^155219394 is an apocalyptic number.

155219394 is an abundant number, since it is smaller than the sum of its proper divisors (184436286).

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

155219394 is a wasteful number, since it uses less digits than its factorization.

155219394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6926.

The product of its digits is 48600, while the sum is 39.

The square root of 155219394 is about 12458.7075573673. The cubic root of 155219394 is about 537.4218602111.

The spelling of 155219394 in words is "one hundred fifty-five million, two hundred nineteen thousand, three hundred ninety-four".