30250221761 has 2 divisors, whose sum is σ = 30250221762. Its totient is φ = 30250221760.

The previous prime is 30250221709. The next prime is 30250221773. The reversal of 30250221761 is 16712205203.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23901160000 + 6349061761 = 154600^2 + 79681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30250221761 is a prime.

It is a super-2 number, since 2×30250221761² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30250221791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15125110880 + 15125110881.

It is an arithmetic number, because the mean of its divisors is an integer number (15125110881).

Almost surely, 2^30250221761 is an apocalyptic number.

It is an amenable number.

30250221761 is a deficient number, since it is larger than the sum of its proper divisors (1).

30250221761 is an equidigital number, since it uses as much as digits as its factorization.

30250221761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 30250221761 its reverse (16712205203), we get a palindrome (46962426964).

The spelling of 30250221761 in words is "thirty billion, two hundred fifty million, two hundred twenty-one thousand, seven hundred sixty-one".