1081551800 has 48 divisors (see below), whose sum is σ = 2873841360. Its totient is φ = 370817280.

The previous prime is 1081551799. The next prime is 1081551803. The reversal of 1081551800 is 81551801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081551803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384869 + ... + 387668.

It is an arithmetic number, because the mean of its divisors is an integer number (59871695).

Almost surely, 2^1081551800 is an apocalyptic number.

1081551800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1081551800 is an abundant number, since it is smaller than the sum of its proper divisors (1792289560).

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

1081551800 is a wasteful number, since it uses less digits than its factorization.

1081551800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772560 (or 772551 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 29.

The square root of 1081551800 is about 32886.9548605522. The cubic root of 1081551800 is about 1026.4767292602.

Subtracting from 1081551800 its reverse (81551801), we obtain a palindrome (999999999).

The spelling of 1081551800 in words is "one billion, eighty-one million, five hundred fifty-one thousand, eight hundred".