13220025 has 72 divisors (see below), whose sum is σ = 27230400. Its totient is φ = 5541120.

The previous prime is 13220023. The next prime is 13220041. The reversal of 13220025 is 52002231.

It is not a de Polignac number, because 13220025 - 2¹ = 13220023 is a prime.

It is a super-2 number, since 2×13220025² = 349538122001250, 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 = 13219986 and 13220013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220021) 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 71 ways as a sum of consecutive naturals, for example, 88651 + ... + 88799.

It is an arithmetic number, because the mean of its divisors is an integer number (378200).

Almost surely, 2^13220025 is an apocalyptic number.

13220025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13220025 is an abundant number, since it is smaller than the sum of its proper divisors (14010375).

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

13220025 is a wasteful number, since it uses less digits than its factorization.

13220025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 13220025 is about 3635.9352304462. The cubic root of 13220025 is about 236.4525990877.

Adding to 13220025 its reverse (52002231), we get a palindrome (65222256).

The spelling of 13220025 in words is "thirteen million, two hundred twenty thousand, twenty-five".