220025000 has 96 divisors (see below), whose sum is σ = 556136280. Its totient is φ = 81120000.

The previous prime is 220024991. The next prime is 220025009. The reversal of 220025000 is 520022.

It is an interprime number because it is at equal distance from previous prime (220024991) and next prime (220025009).

It can be written as a sum of positive squares in 12 ways, for example, as 67798756 + 152226244 = 8234^2 + 12338^2 .

It is a super-2 number, since 2×220025000² = 96822001250000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220025009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 324662 + ... + 325338.

Almost surely, 2^220025000 is an apocalyptic number.

220025000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220025000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278068140).

220025000 is an abundant number, since it is smaller than the sum of its proper divisors (336111280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220025000 is an equidigital number, since it uses as much as digits as its factorization.

220025000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 220025000 is about 14833.2397000790. The cubic root of 220025000 is about 603.7039395210.

Adding to 220025000 its reverse (520022), we get a palindrome (220545022).

The spelling of 220025000 in words is "two hundred twenty million, twenty-five thousand".