13430525921 has 2 divisors, whose sum is σ = 13430525922. Its totient is φ = 13430525920.

The previous prime is 13430525893. The next prime is 13430525939. The reversal of 13430525921 is 12952503431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11058835921 + 2371690000 = 105161^2 + 48700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13430525921 is a prime.

It is a super-4 number, since 4×13430525921⁴ (a number of 42 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (13430525951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6715262960 + 6715262961.

It is an arithmetic number, because the mean of its divisors is an integer number (6715262961).

Almost surely, 2^13430525921 is an apocalyptic number.

It is an amenable number.

13430525921 is a deficient number, since it is larger than the sum of its proper divisors (1).

13430525921 is an equidigital number, since it uses as much as digits as its factorization.

13430525921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 13430525921 in words is "thirteen billion, four hundred thirty million, five hundred twenty-five thousand, nine hundred twenty-one".