425535693221 has 2 divisors, whose sum is σ = 425535693222. Its totient is φ = 425535693220.

The previous prime is 425535693211. The next prime is 425535693241. The reversal of 425535693221 is 122396535524.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415438257025 + 10097436196 = 644545^2 + 100486^2 .

It is a cyclic number.

It is not a de Polignac number, because 425535693221 - 2³⁸ = 150657786277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425535693211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212767846610 + 212767846611.

It is an arithmetic number, because the mean of its divisors is an integer number (212767846611).

Almost surely, 2^425535693221 is an apocalyptic number.

It is an amenable number.

425535693221 is a deficient number, since it is larger than the sum of its proper divisors (1).

425535693221 is an equidigital number, since it uses as much as digits as its factorization.

425535693221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944000, while the sum is 47.

The spelling of 425535693221 in words is "four hundred twenty-five billion, five hundred thirty-five million, six hundred ninety-three thousand, two hundred twenty-one".