425255232421 has 2 divisors, whose sum is σ = 425255232422. Its totient is φ = 425255232420.

The previous prime is 425255232331. The next prime is 425255232427. The reversal of 425255232421 is 124232552524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409234001796 + 16021230625 = 639714^2 + 126575^2 .

It is a cyclic number.

It is not a de Polignac number, because 425255232421 - 2¹⁹ = 425254708133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425255232427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212627616210 + 212627616211.

It is an arithmetic number, because the mean of its divisors is an integer number (212627616211).

Almost surely, 2^425255232421 is an apocalyptic number.

It is an amenable number.

425255232421 is a deficient number, since it is larger than the sum of its proper divisors (1).

425255232421 is an equidigital number, since it uses as much as digits as its factorization.

425255232421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192000, while the sum is 37.

Adding to 425255232421 its reverse (124232552524), we get a palindrome (549487784945).

The spelling of 425255232421 in words is "four hundred twenty-five billion, two hundred fifty-five million, two hundred thirty-two thousand, four hundred twenty-one".