425420344250221 has 4 divisors (see below), whose sum is σ = 426990161018944. Its totient is φ = 423850527481500.

The previous prime is 425420344250147. The next prime is 425420344250227. The reversal of 425420344250221 is 122052443024524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 425420344250221 - 2⁹ = 425420344249709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425420344250227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 784908383955 + ... + 784908384496.

It is an arithmetic number, because the mean of its divisors is an integer number (106747540254736).

Almost surely, 2^{425420344250221} is an apocalyptic number.

It is an amenable number.

425420344250221 is a deficient number, since it is larger than the sum of its proper divisors (1569816768723).

425420344250221 is a wasteful number, since it uses less digits than its factorization.

425420344250221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569816768722.

The product of its (nonzero) digits is 614400, while the sum is 40.

Adding to 425420344250221 its reverse (122052443024524), we get a palindrome (547472787274745).

The spelling of 425420344250221 in words is "four hundred twenty-five trillion, four hundred twenty billion, three hundred forty-four million, two hundred fifty thousand, two hundred twenty-one".