20225157 has 4 divisors (see below), whose sum is σ = 26966880. Its totient is φ = 13483436.

The previous prime is 20225147. The next prime is 20225159. The reversal of 20225157 is 75152202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20225157 - 2⁸ = 20224901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20225159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3370857 + ... + 3370862.

It is an arithmetic number, because the mean of its divisors is an integer number (6741720).

Almost surely, 2^20225157 is an apocalyptic number.

It is an amenable number.

20225157 is a deficient number, since it is larger than the sum of its proper divisors (6741723).

20225157 is an equidigital number, since it uses as much as digits as its factorization.

20225157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6741722.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 20225157 is about 4497.2388195425. The cubic root of 20225157 is about 272.4565797888.

Adding to 20225157 its reverse (75152202), we get a palindrome (95377359).

The spelling of 20225157 in words is "twenty million, two hundred twenty-five thousand, one hundred fifty-seven".