155014220 has 12 divisors (see below), whose sum is σ = 325529904. Its totient is φ = 62005680.

The previous prime is 155014219. The next prime is 155014253. The reversal of 155014220 is 22410551.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 7750711 = 155014220 / (1 + 5 + 5 + 0 + 1 + 4 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 155014192 and 155014201.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3875336 + ... + 3875375.

It is an arithmetic number, because the mean of its divisors is an integer number (27127492).

Almost surely, 2^155014220 is an apocalyptic number.

155014220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155014220 is an abundant number, since it is smaller than the sum of its proper divisors (170515684).

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

155014220 is a wasteful number, since it uses less digits than its factorization.

155014220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7750720 (or 7750718 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 155014220 is about 12450.4706738340. The cubic root of 155014220 is about 537.1849619525.

Adding to 155014220 its reverse (22410551), we get a palindrome (177424771).

The spelling of 155014220 in words is "one hundred fifty-five million, fourteen thousand, two hundred twenty".