154022220 has 144 divisors (see below), whose sum is σ = 515144448. Its totient is φ = 36938880.

The previous prime is 154022203. The next prime is 154022233. The reversal of 154022220 is 22220451.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 154022193 and 154022202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 211497 + ... + 212223.

It is an arithmetic number, because the mean of its divisors is an integer number (3577392).

Almost surely, 2^154022220 is an apocalyptic number.

154022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257572224).

154022220 is an abundant number, since it is smaller than the sum of its proper divisors (361122228).

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

154022220 is a wasteful number, since it uses less digits than its factorization.

154022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860 (or 855 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 154022220 is about 12410.5688830126. The cubic root of 154022220 is about 536.0366194258.

Adding to 154022220 its reverse (22220451), we get a palindrome (176242671).

The spelling of 154022220 in words is "one hundred fifty-four million, twenty-two thousand, two hundred twenty".