2272731521 has 2 divisors, whose sum is σ = 2272731522. Its totient is φ = 2272731520.

The previous prime is 2272731511. The next prime is 2272731533. The reversal of 2272731521 is 1251372722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2117380225 + 155351296 = 46015^2 + 12464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2272731521 is a prime.

It is not a weakly prime, because it can be changed into another prime (2272731511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1136365760 + 1136365761.

It is an arithmetic number, because the mean of its divisors is an integer number (1136365761).

Almost surely, 2^2272731521 is an apocalyptic number.

It is an amenable number.

2272731521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2272731521 is an equidigital number, since it uses as much as digits as its factorization.

2272731521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 32.

The square root of 2272731521 is about 47673.1740185191. The cubic root of 2272731521 is about 1314.7687663697.

The spelling of 2272731521 in words is "two billion, two hundred seventy-two million, seven hundred thirty-one thousand, five hundred twenty-one".