2279663521 has 2 divisors, whose sum is σ = 2279663522. Its totient is φ = 2279663520.

The previous prime is 2279663489. The next prime is 2279663563. The reversal of 2279663521 is 1253669722.

2279663521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1381162896 + 898500625 = 37164^2 + 29975^2 .

It is a cyclic number.

It is not a de Polignac number, because 2279663521 - 2⁵ = 2279663489 is a prime.

It is a super-3 number, since 3×2279663521³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2279663821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139831760 + 1139831761.

It is an arithmetic number, because the mean of its divisors is an integer number (1139831761).

Almost surely, 2^2279663521 is an apocalyptic number.

It is an amenable number.

2279663521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2279663521 is an equidigital number, since it uses as much as digits as its factorization.

2279663521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 43.

The square root of 2279663521 is about 47745.8220266444. The cubic root of 2279663521 is about 1316.1041237831.

The spelling of 2279663521 in words is "two billion, two hundred seventy-nine million, six hundred sixty-three thousand, five hundred twenty-one".