2101445520 has 80 divisors (see below), whose sum is σ = 6521255232. Its totient is φ = 559802880.

The previous prime is 2101445509. The next prime is 2101445551. The reversal of 2101445520 is 255441012.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258315 + ... + 266325.

Almost surely, 2^2101445520 is an apocalyptic number.

2101445520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101445520 is an abundant number, since it is smaller than the sum of its proper divisors (4419809712).

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

2101445520 is a wasteful number, since it uses less digits than its factorization.

2101445520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9120 (or 9114 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 2101445520 is about 45841.5261526053. The cubic root of 2101445520 is about 1280.8729234360.

Adding to 2101445520 its reverse (255441012), we get a palindrome (2356886532).

The spelling of 2101445520 in words is "two billion, one hundred one million, four hundred forty-five thousand, five hundred twenty".