30240237281 has 2 divisors, whose sum is σ = 30240237282. Its totient is φ = 30240237280.

The previous prime is 30240237271. The next prime is 30240237289. The reversal of 30240237281 is 18273204203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28767212881 + 1473024400 = 169609^2 + 38380^2 .

It is a cyclic number.

It is not a de Polignac number, because 30240237281 - 2⁶ = 30240237217 is a prime.

It is a super-2 number, since 2×30240237281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30240237289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15120118640 + 15120118641.

It is an arithmetic number, because the mean of its divisors is an integer number (15120118641).

Almost surely, 2^30240237281 is an apocalyptic number.

It is an amenable number.

30240237281 is a deficient number, since it is larger than the sum of its proper divisors (1).

30240237281 is an equidigital number, since it uses as much as digits as its factorization.

30240237281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

The spelling of 30240237281 in words is "thirty billion, two hundred forty million, two hundred thirty-seven thousand, two hundred eighty-one".