221300157 has 16 divisors (see below), whose sum is σ = 322121408. Its totient is φ = 134317440.

The previous prime is 221300143. The next prime is 221300159. The reversal of 221300157 is 751003122.

It is not a de Polignac number, because 221300157 - 2¹¹ = 221298109 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 (221300159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36019 + ... + 41712.

It is an arithmetic number, because the mean of its divisors is an integer number (20132588).

Almost surely, 2^221300157 is an apocalyptic number.

It is an amenable number.

221300157 is a deficient number, since it is larger than the sum of its proper divisors (100821251).

221300157 is a wasteful number, since it uses less digits than its factorization.

221300157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77820.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 221300157 is about 14876.1606942114. The cubic root of 221300157 is about 604.8679510546.

Adding to 221300157 its reverse (751003122), we get a palindrome (972303279).

The spelling of 221300157 in words is "two hundred twenty-one million, three hundred thousand, one hundred fifty-seven".