155221411 has 8 divisors (see below), whose sum is σ = 163155744. Its totient is φ = 147385920.

The previous prime is 155221399. The next prime is 155221459. The reversal of 155221411 is 114122551.

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 155221411 - 2²¹ = 153124259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155221481) 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 7 ways as a sum of consecutive naturals, for example, 21480 + ... + 27781.

It is an arithmetic number, because the mean of its divisors is an integer number (20394468).

Almost surely, 2^155221411 is an apocalyptic number.

155221411 is a deficient number, since it is larger than the sum of its proper divisors (7934333).

155221411 is a wasteful number, since it uses less digits than its factorization.

155221411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49421.

The product of its digits is 400, while the sum is 22.

The square root of 155221411 is about 12458.7885045056. The cubic root of 155221411 is about 537.4241880456.

Adding to 155221411 its reverse (114122551), we get a palindrome (269343962).

The spelling of 155221411 in words is "one hundred fifty-five million, two hundred twenty-one thousand, four hundred eleven".