154051220 has 12 divisors (see below), whose sum is σ = 323507604. Its totient is φ = 61620480.

The previous prime is 154051213. The next prime is 154051279. The reversal of 154051220 is 22150451.

It can be written as a sum of positive squares in 2 ways, for example, as 121264144 + 32787076 = 11012^2 + 5726^2 .

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: 7702561 = 154051220 / (1 + 5 + 4 + 0 + 5 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 154051192 and 154051201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3851261 + ... + 3851300.

It is an arithmetic number, because the mean of its divisors is an integer number (26958967).

Almost surely, 2^154051220 is an apocalyptic number.

154051220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154051220 is an abundant number, since it is smaller than the sum of its proper divisors (169456384).

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

154051220 is a wasteful number, since it uses less digits than its factorization.

154051220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7702570 (or 7702568 counting only the distinct ones).

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

The square root of 154051220 is about 12411.7371870339. The cubic root of 154051220 is about 536.0702597807.

The spelling of 154051220 in words is "one hundred fifty-four million, fifty-one thousand, two hundred twenty".