2181376297 has 4 divisors (see below), whose sum is σ = 2181562240. Its totient is φ = 2181190356.

The previous prime is 2181376277. The next prime is 2181376303. The reversal of 2181376297 is 7926731812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2181376297 is a prime.

It is a super-2 number, since 2×2181376297² = 9516805098226864418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2181376207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74097 + ... + 99262.

It is an arithmetic number, because the mean of its divisors is an integer number (545390560).

Almost surely, 2^2181376297 is an apocalyptic number.

It is an amenable number.

2181376297 is a deficient number, since it is larger than the sum of its proper divisors (185943).

2181376297 is a wasteful number, since it uses less digits than its factorization.

2181376297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185942.

The product of its digits is 254016, while the sum is 46.

The square root of 2181376297 is about 46705.2063157845. The cubic root of 2181376297 is about 1296.9110679722.

The spelling of 2181376297 in words is "two billion, one hundred eighty-one million, three hundred seventy-six thousand, two hundred ninety-seven".