25321221683 has 2 divisors, whose sum is σ = 25321221684. Its totient is φ = 25321221682.

The previous prime is 25321221649. The next prime is 25321221713. The reversal of 25321221683 is 38612212352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25321221683 - 2⁶ = 25321221619 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25321224683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12660610841 + 12660610842.

It is an arithmetic number, because the mean of its divisors is an integer number (12660610842).

Almost surely, 2^25321221683 is an apocalyptic number.

25321221683 is a deficient number, since it is larger than the sum of its proper divisors (1).

25321221683 is an equidigital number, since it uses as much as digits as its factorization.

25321221683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The spelling of 25321221683 in words is "twenty-five billion, three hundred twenty-one million, two hundred twenty-one thousand, six hundred eighty-three".