155822238 has 128 divisors (see below), whose sum is σ = 431101440. Its totient is φ = 40988160.

The previous prime is 155822237. The next prime is 155822257. The reversal of 155822238 is 832228551.

155822238 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155822237) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 130681 + ... + 131867.

It is an arithmetic number, because the mean of its divisors is an integer number (3367980).

Almost surely, 2^155822238 is an apocalyptic number.

155822238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155822238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215550720).

155822238 is an abundant number, since it is smaller than the sum of its proper divisors (275279202).

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

155822238 is a wasteful number, since it uses less digits than its factorization.

155822238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239 (or 1233 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 155822238 is about 12482.8777932014. The cubic root of 155822238 is about 538.1167111351.

The spelling of 155822238 in words is "one hundred fifty-five million, eight hundred twenty-two thousand, two hundred thirty-eight".