1153551100 has 72 divisors (see below), whose sum is σ = 2701511120. Its totient is φ = 425018880.

The previous prime is 1153551059. The next prime is 1153551101. The reversal of 1153551100 is 11553511.

It is a super-2 number, since 2×1153551100² = 2661360280622420000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153551101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1116184 + ... + 1117216.

Almost surely, 2^1153551100 is an apocalyptic number.

1153551100 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 1153551100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1350755560).

1153551100 is an abundant number, since it is smaller than the sum of its proper divisors (1547960020).

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

1153551100 is a wasteful number, since it uses less digits than its factorization.

1153551100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919 (or 1912 counting only the distinct ones).

The product of its (nonzero) digits is 375, while the sum is 22.

The square root of 1153551100 is about 33963.9676716370. The cubic root of 1153551100 is about 1048.7668364912.

The spelling of 1153551100 in words is "one billion, one hundred fifty-three million, five hundred fifty-one thousand, one hundred".