2045551100 has 36 divisors (see below), whose sum is σ = 4480353864. Its totient is φ = 810569280.

The previous prime is 2045551099. The next prime is 2045551111. The reversal of 2045551100 is 11555402.

It is a happy number.

It is a super-2 number, since 2×2045551100² = 8368558605422420000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84887 + ... + 106286.

It is an arithmetic number, because the mean of its divisors is an integer number (124454274).

Almost surely, 2^2045551100 is an apocalyptic number.

2045551100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2045551100 is an abundant number, since it is smaller than the sum of its proper divisors (2434802764).

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

2045551100 is a wasteful number, since it uses less digits than its factorization.

2045551100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191294 (or 191287 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 2045551100 is about 45227.7691247313. The cubic root of 2045551100 is about 1269.4144695803.

The spelling of 2045551100 in words is "two billion, forty-five million, five hundred fifty-one thousand, one hundred".