2721813253 has 2 divisors, whose sum is σ = 2721813254. Its totient is φ = 2721813252.

The previous prime is 2721813239. The next prime is 2721813313. The reversal of 2721813253 is 3523181272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1519596324 + 1202216929 = 38982^2 + 34673^2 .

It is a cyclic number.

It is not a de Polignac number, because 2721813253 - 2¹³ = 2721805061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2721813223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360906626 + 1360906627.

It is an arithmetic number, because the mean of its divisors is an integer number (1360906627).

Almost surely, 2^2721813253 is an apocalyptic number.

It is an amenable number.

2721813253 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721813253 is an equidigital number, since it uses as much as digits as its factorization.

2721813253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 34.

The square root of 2721813253 is about 52171.0001150064. Note that the first 3 decimals coincide. The cubic root of 2721813253 is about 1396.2165281617.

The spelling of 2721813253 in words is "two billion, seven hundred twenty-one million, eight hundred thirteen thousand, two hundred fifty-three".