1530821602139 has 2 divisors, whose sum is σ = 1530821602140. Its totient is φ = 1530821602138.

The previous prime is 1530821602021. The next prime is 1530821602151. The reversal of 1530821602139 is 9312061280351.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1530821602139 - 2¹² = 1530821598043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1530821602096 and 1530821602105.

It is not a weakly prime, because it can be changed into another prime (1530821602939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765410801069 + 765410801070.

It is an arithmetic number, because the mean of its divisors is an integer number (765410801070).

Almost surely, 2^{1530821602139} is an apocalyptic number.

1530821602139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1530821602139 is an equidigital number, since it uses as much as digits as its factorization.

1530821602139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 1530821602139 in words is "one trillion, five hundred thirty billion, eight hundred twenty-one million, six hundred two thousand, one hundred thirty-nine".