154851220 has 12 divisors (see below), whose sum is σ = 325187604. Its totient is φ = 61940480.

The previous prime is 154851217. The next prime is 154851233. The reversal of 154851220 is 22158451.

It can be written as a sum of positive squares in 2 ways, for example, as 118417924 + 36433296 = 10882^2 + 6036^2 .

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, 3871261 + ... + 3871300.

It is an arithmetic number, because the mean of its divisors is an integer number (27098967).

Almost surely, 2^154851220 is an apocalyptic number.

154851220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154851220 is an abundant number, since it is smaller than the sum of its proper divisors (170336384).

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

154851220 is a wasteful number, since it uses less digits than its factorization.

154851220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7742570 (or 7742568 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 154851220 is about 12443.9230148695. The cubic root of 154851220 is about 536.9966096465.

The spelling of 154851220 in words is "one hundred fifty-four million, eight hundred fifty-one thousand, two hundred twenty".