1551550000 has 480 divisors, whose sum is σ = 5207666688. Its totient is φ = 432000000.

The previous prime is 1551549997. The next prime is 1551550001. The reversal of 1551550000 is 551551.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1551550001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 50049985 + ... + 50050015.

Almost surely, 2^1551550000 is an apocalyptic number.

1551550000 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 1551550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2603833344).

1551550000 is an abundant number, since it is smaller than the sum of its proper divisors (3656116688).

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

1551550000 is a wasteful number, since it uses less digits than its factorization.

1551550000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 22.

The square root of 1551550000 is about 39389.7194709483. The cubic root of 1551550000 is about 1157.6801635885.

It can be divided in two parts, 155 and 1550000, that multiplied together give a square (240250000 = 15500²).

The spelling of 1551550000 in words is "one billion, five hundred fifty-one million, five hundred fifty thousand".