22220025 has 48 divisors (see below), whose sum is σ = 39997440. Its totient is φ = 10843200.

The previous prime is 22219999. The next prime is 22220027. The reversal of 22220025 is 52002222.

It is not a de Polignac number, because 22220025 - 2⁵ = 22219993 is a prime.

It is a super-2 number, since 2×22220025² = 987459022001250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 22219986 and 22220013.

It is not an unprimeable number, because it can be changed into a prime (22220027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43924 + ... + 44426.

It is an arithmetic number, because the mean of its divisors is an integer number (833280).

Almost surely, 2^22220025 is an apocalyptic number.

22220025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22220025 is a deficient number, since it is larger than the sum of its proper divisors (17777415).

22220025 is a wasteful number, since it uses less digits than its factorization.

22220025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 22220025 is about 4713.8121515393. The cubic root of 22220025 is about 281.1349554169.

Adding to 22220025 its reverse (52002222), we get a palindrome (74222247).

The spelling of 22220025 in words is "twenty-two million, two hundred twenty thousand, twenty-five".