2154245497 has 2 divisors, whose sum is σ = 2154245498. Its totient is φ = 2154245496.

The previous prime is 2154245477. The next prime is 2154245543. The reversal of 2154245497 is 7945424512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1928615056 + 225630441 = 43916^2 + 15021^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154245497 - 2¹⁹ = 2153721209 is a prime.

It is a super-2 number, since 2×2154245497² = 9281547322689554018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2154245477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077122748 + 1077122749.

It is an arithmetic number, because the mean of its divisors is an integer number (1077122749).

Almost surely, 2^2154245497 is an apocalyptic number.

It is an amenable number.

2154245497 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154245497 is an equidigital number, since it uses as much as digits as its factorization.

2154245497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 43.

The square root of 2154245497 is about 46413.8502712283. The cubic root of 2154245497 is about 1291.5118578272.

The spelling of 2154245497 in words is "two billion, one hundred fifty-four million, two hundred forty-five thousand, four hundred ninety-seven".