20154225 has 48 divisors (see below), whose sum is σ = 41025152. Its totient is φ = 8501760.

The previous prime is 20154191. The next prime is 20154227. The reversal of 20154225 is 52245102.

It is a happy number.

It is not a de Polignac number, because 20154225 - 2⁷ = 20154097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20154227) 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, 5349 + ... + 8301.

Almost surely, 2^20154225 is an apocalyptic number.

20154225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20154225 is an abundant number, since it is smaller than the sum of its proper divisors (20870927).

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

20154225 is a wasteful number, since it uses less digits than its factorization.

20154225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986 (or 2981 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 20154225 is about 4489.3457207036. The cubic root of 20154225 is about 272.1376943044.

Adding to 20154225 its reverse (52245102), we get a palindrome (72399327).

The spelling of 20154225 in words is "twenty million, one hundred fifty-four thousand, two hundred twenty-five".