2146561197 has 16 divisors (see below), whose sum is σ = 3135682368. Its totient is φ = 1295358080.

The previous prime is 2146561177. The next prime is 2146561201. The reversal of 2146561197 is 7911656412.

It is a cyclic number.

It is not a de Polignac number, because 2146561197 - 2¹⁰ = 2146560173 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2146561177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131898 + ... + 147275.

It is an arithmetic number, because the mean of its divisors is an integer number (195980148).

Almost surely, 2^2146561197 is an apocalyptic number.

It is an amenable number.

2146561197 is a deficient number, since it is larger than the sum of its proper divisors (989121171).

2146561197 is a wasteful number, since it uses less digits than its factorization.

2146561197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279420.

The product of its digits is 90720, while the sum is 42.

The square root of 2146561197 is about 46330.9960717445. The cubic root of 2146561197 is about 1289.9743994679.

The spelling of 2146561197 in words is "two billion, one hundred forty-six million, five hundred sixty-one thousand, one hundred ninety-seven".