2145820297 has 8 divisors (see below), whose sum is σ = 2195707392. Its totient is φ = 2096109600.

The previous prime is 2145820277. The next prime is 2145820301. The reversal of 2145820297 is 7920285412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2145820297 - 2¹¹ = 2145818249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145820247) 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, 19329 + ... + 68302.

It is an arithmetic number, because the mean of its divisors is an integer number (274463424).

Almost surely, 2^2145820297 is an apocalyptic number.

It is an amenable number.

2145820297 is a deficient number, since it is larger than the sum of its proper divisors (49887095).

2145820297 is an equidigital number, since it uses as much as digits as its factorization.

2145820297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88199.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 2145820297 is about 46322.9996545992. Note that the first 3 decimals coincide. The cubic root of 2145820297 is about 1289.8259679494.

The spelling of 2145820297 in words is "two billion, one hundred forty-five million, eight hundred twenty thousand, two hundred ninety-seven".