155222000000 has 112 divisors (see below), whose sum is σ = 386539192860. Its totient is φ = 62088000000.

The previous prime is 155221999973. The next prime is 155222000041. The reversal of 155222000000 is 222551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1961195 + ... + 2038805.

Almost surely, 2^155222000000 is an apocalyptic number.

155222000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155222000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193269596430).

155222000000 is an abundant number, since it is smaller than the sum of its proper divisors (231317192860).

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

155222000000 is an frugal number, since it uses more digits than its factorization.

155222000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77655 (or 77618 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

Adding to 155222000000 its reverse (222551), we get a palindrome (155222222551).

The spelling of 155222000000 in words is "one hundred fifty-five billion, two hundred twenty-two million", and thus it is an aban number.