2195187406 has 16 divisors (see below), whose sum is σ = 3357280080. Its totient is φ = 1076302080.

The previous prime is 2195187389. The next prime is 2195187409. The reversal of 2195187406 is 6047815912.

It is a super-2 number, since 2×2195187406² = 9637695494922017672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2195187409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30760 + ... + 73051.

It is an arithmetic number, because the mean of its divisors is an integer number (209830005).

Almost surely, 2^2195187406 is an apocalyptic number.

2195187406 is a deficient number, since it is larger than the sum of its proper divisors (1162092674).

2195187406 is a wasteful number, since it uses less digits than its factorization.

2195187406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104019.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 2195187406 is about 46852.8270865270. The cubic root of 2195187406 is about 1299.6423880255.

The spelling of 2195187406 in words is "two billion, one hundred ninety-five million, one hundred eighty-seven thousand, four hundred six".