2194101520 has 80 divisors (see below), whose sum is σ = 5515740720. Its totient is φ = 806879232.

The previous prime is 2194101509. The next prime is 2194101599. The reversal of 2194101520 is 251014912.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 82882816 + 2111218704 = 9104^2 + 45948^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263176 + ... + 271384.

It is an arithmetic number, because the mean of its divisors is an integer number (68946759).

Almost surely, 2^2194101520 is an apocalyptic number.

2194101520 is a gapful number since it is divisible by the number (20) 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 2194101520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2757870360).

2194101520 is an abundant number, since it is smaller than the sum of its proper divisors (3321639200).

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

2194101520 is a wasteful number, since it uses less digits than its factorization.

2194101520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8492 (or 8486 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2194101520 is about 46841.2373875840. The cubic root of 2194101520 is about 1299.4280560986.

The spelling of 2194101520 in words is "two billion, one hundred ninety-four million, one hundred one thousand, five hundred twenty".