2775252521 has 2 divisors, whose sum is σ = 2775252522. Its totient is φ = 2775252520.

The previous prime is 2775252517. The next prime is 2775252539. The reversal of 2775252521 is 1252525772.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2773496896 + 1755625 = 52664^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 2775252521 - 2² = 2775252517 is a prime.

It is not a weakly prime, because it can be changed into another prime (2775252511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1387626260 + 1387626261.

It is an arithmetic number, because the mean of its divisors is an integer number (1387626261).

Almost surely, 2^2775252521 is an apocalyptic number.

It is an amenable number.

2775252521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2775252521 is an equidigital number, since it uses as much as digits as its factorization.

2775252521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98000, while the sum is 38.

The square root of 2775252521 is about 52680.6655330018. The cubic root of 2775252521 is about 1405.2950028760.

The spelling of 2775252521 in words is "two billion, seven hundred seventy-five million, two hundred fifty-two thousand, five hundred twenty-one".