220505425 has 12 divisors (see below), whose sum is σ = 312487936. Its totient is φ = 151203600.

The previous prime is 220505413. The next prime is 220505437. The reversal of 220505425 is 524505022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (220505413) and next prime (220505437).

It is not a de Polignac number, because 220505425 - 2¹⁵ = 220472657 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220505425.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 629841 + ... + 630190.

Almost surely, 2^220505425 is an apocalyptic number.

220505425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220505425 is a deficient number, since it is larger than the sum of its proper divisors (91982511).

220505425 is a wasteful number, since it uses less digits than its factorization.

220505425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260048 (or 1260043 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 220505425 is about 14849.4250730458. The cubic root of 220505425 is about 604.1430163288.

The spelling of 220505425 in words is "two hundred twenty million, five hundred five thousand, four hundred twenty-five".