422206521 has 8 divisors (see below), whose sum is σ = 614118624. Its totient is φ = 255882720.

The previous prime is 422206511. The next prime is 422206531. The reversal of 422206521 is 125602224.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (422206511) and next prime (422206531).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 422206521 - 2⁵ = 422206489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 422206491 and 422206500.

It is not an unprimeable number, because it can be changed into a prime (422206501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6397036 + ... + 6397101.

It is an arithmetic number, because the mean of its divisors is an integer number (76764828).

Almost surely, 2^422206521 is an apocalyptic number.

It is an amenable number.

422206521 is a deficient number, since it is larger than the sum of its proper divisors (191912103).

422206521 is a wasteful number, since it uses less digits than its factorization.

422206521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12794151.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 422206521 is about 20547.6646118239. The cubic root of 422206521 is about 750.1964054509.

Adding to 422206521 its reverse (125602224), we get a palindrome (547808745).

The spelling of 422206521 in words is "four hundred twenty-two million, two hundred six thousand, five hundred twenty-one".