30402155491 has 2 divisors, whose sum is σ = 30402155492. Its totient is φ = 30402155490.

The previous prime is 30402155473. The next prime is 30402155501. The reversal of 30402155491 is 19455120403.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30402155491 - 2¹⁹ = 30401631203 is a prime.

It is not a weakly prime, because it can be changed into another prime (30402155471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15201077745 + 15201077746.

It is an arithmetic number, because the mean of its divisors is an integer number (15201077746).

Almost surely, 2^30402155491 is an apocalyptic number.

30402155491 is a deficient number, since it is larger than the sum of its proper divisors (1).

30402155491 is an equidigital number, since it uses as much as digits as its factorization.

30402155491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 30402155491 its reverse (19455120403), we get a palindrome (49857275894).

The spelling of 30402155491 in words is "thirty billion, four hundred two million, one hundred fifty-five thousand, four hundred ninety-one".