1553225920 has 112 divisors (see below), whose sum is σ = 3841504128. Its totient is φ = 597749760.

The previous prime is 1553225887. The next prime is 1553225929. The reversal of 1553225920 is 295223551.

It is not an unprimeable number, because it can be changed into a prime (1553225929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 916594 + ... + 918286.

It is an arithmetic number, because the mean of its divisors is an integer number (34299144).

Almost surely, 2^1553225920 is an apocalyptic number.

1553225920 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 1553225920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1920752064).

1553225920 is an abundant number, since it is smaller than the sum of its proper divisors (2288278208).

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

1553225920 is a wasteful number, since it uses less digits than its factorization.

1553225920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818 (or 1808 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 1553225920 is about 39410.9873004978. The cubic root of 1553225920 is about 1158.0968396418.

The spelling of 1553225920 in words is "one billion, five hundred fifty-three million, two hundred twenty-five thousand, nine hundred twenty".