423220525 has 96 divisors (see below), whose sum is σ = 707954688. Its totient is φ = 243302400.

The previous prime is 423220517. The next prime is 423220531. The reversal of 423220525 is 525022324.

It is a happy number.

It is not a de Polignac number, because 423220525 - 2³ = 423220517 is a prime.

It is a super-2 number, since 2×423220525² = 358231225562551250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 423220525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1198749 + ... + 1199101.

It is an arithmetic number, because the mean of its divisors is an integer number (7374528).

Almost surely, 2^423220525 is an apocalyptic number.

It is an amenable number.

423220525 is a deficient number, since it is larger than the sum of its proper divisors (284734163).

423220525 is a wasteful number, since it uses less digits than its factorization.

423220525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 423220525 is about 20572.3242488543. The cubic root of 423220525 is about 750.7965019615.

Adding to 423220525 its reverse (525022324), we get a palindrome (948242849).

The spelling of 423220525 in words is "four hundred twenty-three million, two hundred twenty thousand, five hundred twenty-five".