30402123551 has 2 divisors, whose sum is σ = 30402123552. Its totient is φ = 30402123550.

The previous prime is 30402123541. The next prime is 30402123589. The reversal of 30402123551 is 15532120403.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30402123551 - 2¹⁸ = 30401861407 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30402123551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30402123541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15201061775 + 15201061776.

It is an arithmetic number, because the mean of its divisors is an integer number (15201061776).

Almost surely, 2^30402123551 is an apocalyptic number.

30402123551 is a deficient number, since it is larger than the sum of its proper divisors (1).

30402123551 is an equidigital number, since it uses as much as digits as its factorization.

30402123551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 30402123551 its reverse (15532120403), we get a palindrome (45934243954).

The spelling of 30402123551 in words is "thirty billion, four hundred two million, one hundred twenty-three thousand, five hundred fifty-one".