2197965156 has 96 divisors (see below), whose sum is σ = 5512147200. Its totient is φ = 679256064.

The previous prime is 2197965137. The next prime is 2197965157. The reversal of 2197965156 is 6515697912.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 2197965099 and 2197965108.

It is not an unprimeable number, because it can be changed into a prime (2197965157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5075916 + ... + 5076348.

It is an arithmetic number, because the mean of its divisors is an integer number (57418200).

Almost surely, 2^2197965156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2197965156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2756073600).

2197965156 is an abundant number, since it is smaller than the sum of its proper divisors (3314182044).

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

2197965156 is a wasteful number, since it uses less digits than its factorization.

2197965156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773 (or 771 counting only the distinct ones).

The product of its digits is 1020600, while the sum is 51.

The square root of 2197965156 is about 46882.4610702126. The cubic root of 2197965156 is about 1300.1903382054.

The spelling of 2197965156 in words is "two billion, one hundred ninety-seven million, nine hundred sixty-five thousand, one hundred fifty-six".