1551320000 has 70 divisors (see below), whose sum is σ = 3846868608. Its totient is φ = 620512000.

The previous prime is 1551319963. The next prime is 1551320003. The reversal of 1551320000 is 231551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551320003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 20609 + ... + 59391.

Almost surely, 2^1551320000 is an apocalyptic number.

1551320000 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 1551320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1923434304).

1551320000 is an abundant number, since it is smaller than the sum of its proper divisors (2295548608).

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

1551320000 is an frugal number, since it uses more digits than its factorization.

1551320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38815 (or 38790 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1551320000 is about 39386.7998192288. The cubic root of 1551320000 is about 1157.6229563665.

Adding to 1551320000 its reverse (231551), we get a palindrome (1551551551).

The spelling of 1551320000 in words is "one billion, five hundred fifty-one million, three hundred twenty thousand".