21325555319 has 2 divisors, whose sum is σ = 21325555320. Its totient is φ = 21325555318.

The previous prime is 21325555301. The next prime is 21325555337. The reversal of 21325555319 is 91355552312.

It is a balanced prime because it is at equal distance from previous prime (21325555301) and next prime (21325555337).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21325555319 is a prime.

It is a super-2 number, since 2×21325555319² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21325555519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10662777659 + 10662777660.

It is an arithmetic number, because the mean of its divisors is an integer number (10662777660).

Almost surely, 2^21325555319 is an apocalyptic number.

21325555319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21325555319 is an equidigital number, since it uses as much as digits as its factorization.

21325555319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 202500, while the sum is 41.

The spelling of 21325555319 in words is "twenty-one billion, three hundred twenty-five million, five hundred fifty-five thousand, three hundred nineteen".