1554222120 has 128 divisors (see below), whose sum is σ = 5107898880. Its totient is φ = 375200000.

The previous prime is 1554222091. The next prime is 1554222151. The reversal of 1554222120 is 212224551.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 31 ways as a sum of consecutive naturals, for example, 328975 + ... + 333665.

It is an arithmetic number, because the mean of its divisors is an integer number (39905460).

Almost surely, 2^1554222120 is an apocalyptic number.

1554222120 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 1554222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2553949440).

1554222120 is an abundant number, since it is smaller than the sum of its proper divisors (3553676760).

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

1554222120 is a wasteful number, since it uses less digits than its factorization.

1554222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4967 (or 4963 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1554222120 is about 39423.6238821344. The cubic root of 1554222120 is about 1158.3443781130.

Adding to 1554222120 its reverse (212224551), we get a palindrome (1766446671).

The spelling of 1554222120 in words is "one billion, five hundred fifty-four million, two hundred twenty-two thousand, one hundred twenty".