155143172222 has 12 divisors (see below), whose sum is σ = 243272707440. Its totient is φ = 74198907948.

The previous prime is 155143172143. The next prime is 155143172227. The reversal of 155143172222 is 222271341551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155143172227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73318022 + ... + 73320137.

It is an arithmetic number, because the mean of its divisors is an integer number (20272725620).

Almost surely, 2^155143172222 is an apocalyptic number.

155143172222 is a deficient number, since it is larger than the sum of its proper divisors (88129535218).

155143172222 is a wasteful number, since it uses less digits than its factorization.

155143172222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146638207 (or 146638184 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The spelling of 155143172222 in words is "one hundred fifty-five billion, one hundred forty-three million, one hundred seventy-two thousand, two hundred twenty-two".