2563401121 has 4 divisors (see below), whose sum is σ = 2564826244. Its totient is φ = 2561976000.

The previous prime is 2563401101. The next prime is 2563401193. The reversal of 2563401121 is 1211043652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 860600896 + 1702800225 = 29336^2 + 41265^2 .

It is a cyclic number.

It is not a de Polignac number, because 2563401121 - 2¹¹ = 2563399073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2563401101) 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, 709860 + ... + 713461.

It is an arithmetic number, because the mean of its divisors is an integer number (641206561).

Almost surely, 2^2563401121 is an apocalyptic number.

It is an amenable number.

2563401121 is a deficient number, since it is larger than the sum of its proper divisors (1425123).

2563401121 is a wasteful number, since it uses less digits than its factorization.

2563401121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425122.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2563401121 is about 50630.0416847547. The cubic root of 2563401121 is about 1368.5863054073.

Adding to 2563401121 its reverse (1211043652), we get a palindrome (3774444773).

The spelling of 2563401121 in words is "two billion, five hundred sixty-three million, four hundred one thousand, one hundred twenty-one".