72283261 has 2 divisors, whose sum is σ = 72283262. Its totient is φ = 72283260.

The previous prime is 72283187. The next prime is 72283313. The reversal of 72283261 is 16238227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47183161 + 25100100 = 6869^2 + 5010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72283261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72283061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36141630 + 36141631.

It is an arithmetic number, because the mean of its divisors is an integer number (36141631).

Almost surely, 2^72283261 is an apocalyptic number.

It is an amenable number.

72283261 is a deficient number, since it is larger than the sum of its proper divisors (1).

72283261 is an equidigital number, since it uses as much as digits as its factorization.

72283261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 72283261 is about 8501.9563042867. The cubic root of 72283261 is about 416.5616124127.

The spelling of 72283261 in words is "seventy-two million, two hundred eighty-three thousand, two hundred sixty-one".