426610221 has 4 divisors (see below), whose sum is σ = 568813632. Its totient is φ = 284406812.

The previous prime is 426610201. The next prime is 426610229. The reversal of 426610221 is 122016624.

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 426610221 - 2⁶ = 426610157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 426610191 and 426610200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426610229) 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, 71101701 + ... + 71101706.

It is an arithmetic number, because the mean of its divisors is an integer number (142203408).

Almost surely, 2^426610221 is an apocalyptic number.

It is an amenable number.

426610221 is a deficient number, since it is larger than the sum of its proper divisors (142203411).

426610221 is a wasteful number, since it uses less digits than its factorization.

426610221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142203410.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 426610221 is about 20654.5448025368. The cubic root of 426610221 is about 752.7956232620.

Adding to 426610221 its reverse (122016624), we get a palindrome (548626845).

The spelling of 426610221 in words is "four hundred twenty-six million, six hundred ten thousand, two hundred twenty-one".