155411220 has 48 divisors (see below), whose sum is σ = 435738240. Its totient is φ = 41387136.

The previous prime is 155411213. The next prime is 155411227. The reversal of 155411220 is 22114551.

It is an interprime number because it is at equal distance from previous prime (155411213) and next prime (155411227).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155411227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62929 + ... + 65351.

It is an arithmetic number, because the mean of its divisors is an integer number (9077880).

Almost surely, 2^155411220 is an apocalyptic number.

155411220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155411220 is an abundant number, since it is smaller than the sum of its proper divisors (280327020).

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

155411220 is a wasteful number, since it uses less digits than its factorization.

155411220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3504 (or 3502 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 155411220 is about 12466.4036514145. The cubic root of 155411220 is about 537.6431578297.

Adding to 155411220 its reverse (22114551), we get a palindrome (177525771).

It can be divided in two parts, 15541 and 1220, that added together give a palindrome (16761).

The spelling of 155411220 in words is "one hundred fifty-five million, four hundred eleven thousand, two hundred twenty".