221025157 has 8 divisors (see below), whose sum is σ = 233355200. Its totient is φ = 208764864.

The previous prime is 221025149. The next prime is 221025163. The reversal of 221025157 is 751520122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221025157 - 2³ = 221025149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221025127) 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 7 ways as a sum of consecutive naturals, for example, 10857 + ... + 23662.

It is an arithmetic number, because the mean of its divisors is an integer number (29169400).

Almost surely, 2^221025157 is an apocalyptic number.

It is an amenable number.

221025157 is a deficient number, since it is larger than the sum of its proper divisors (12330043).

221025157 is a wasteful number, since it uses less digits than its factorization.

221025157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34875.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 221025157 is about 14866.9148447148. The cubic root of 221025157 is about 604.6172995759.

Adding to 221025157 its reverse (751520122), we get a palindrome (972545279).

The spelling of 221025157 in words is "two hundred twenty-one million, twenty-five thousand, one hundred fifty-seven".