155224181 has 8 divisors (see below), whose sum is σ = 177512640. Its totient is φ = 132964128.

The previous prime is 155224169. The next prime is 155224183. The reversal of 155224181 is 181422551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155224181 - 2⁶ = 155224117 is a prime.

It is a super-2 number, since 2×155224181² = 48189092734241522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155224183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6305 + ... + 18713.

It is an arithmetic number, because the mean of its divisors is an integer number (22189080).

Almost surely, 2^155224181 is an apocalyptic number.

It is an amenable number.

155224181 is a deficient number, since it is larger than the sum of its proper divisors (22288459).

155224181 is a wasteful number, since it uses less digits than its factorization.

155224181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14203.

The product of its digits is 3200, while the sum is 29.

The square root of 155224181 is about 12458.8996705167. The cubic root of 155224181 is about 537.4273848901.

The spelling of 155224181 in words is "one hundred fifty-five million, two hundred twenty-four thousand, one hundred eighty-one".