2197209960 has 144 divisors (see below), whose sum is σ = 7849279620. Its totient is φ = 532646400.

The previous prime is 2197209943. The next prime is 2197209977. The reversal of 2197209960 is 699027912.

It is an interprime number because it is at equal distance from previous prime (2197209943) and next prime (2197209977).

It can be written as a sum of positive squares in 2 ways, for example, as 2152774404 + 44435556 = 46398^2 + 6666^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18340 + ... + 68780.

Almost surely, 2^2197209960 is an apocalyptic number.

2197209960 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 2197209960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3924639810).

2197209960 is an abundant number, since it is smaller than the sum of its proper divisors (5652069660).

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

2197209960 is a wasteful number, since it uses less digits than its factorization.

2197209960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50480 (or 50462 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 2197209960 is about 46874.4062362394. The cubic root of 2197209960 is about 1300.0414109097.

The spelling of 2197209960 in words is "two billion, one hundred ninety-seven million, two hundred nine thousand, nine hundred sixty".