2195980521 has 24 divisors (see below), whose sum is σ = 3421067040. Its totient is φ = 1249299072.

The previous prime is 2195980477. The next prime is 2195980529. The reversal of 2195980521 is 1250895912.

It is not a de Polignac number, because 2195980521 - 2⁹ = 2195980009 is a prime.

It is a super-2 number, since 2×2195980521² = 9644660897222862882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2195980529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 465 + ... + 66273.

It is an arithmetic number, because the mean of its divisors is an integer number (142544460).

Almost surely, 2^2195980521 is an apocalyptic number.

2195980521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2195980521 is a deficient number, since it is larger than the sum of its proper divisors (1225086519).

2195980521 is a wasteful number, since it uses less digits than its factorization.

2195980521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66053 (or 66046 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 42.

The square root of 2195980521 is about 46861.2902191137. The cubic root of 2195980521 is about 1299.7988882187.

The spelling of 2195980521 in words is "two billion, one hundred ninety-five million, nine hundred eighty thousand, five hundred twenty-one".