157131227 has 4 divisors (see below), whose sum is σ = 171415896. Its totient is φ = 142846560.

The previous prime is 157131217. The next prime is 157131257. The reversal of 157131227 is 722131751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157131227 - 2⁴ = 157131211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157131227.

It is not an unprimeable number, because it can be changed into a prime (157131217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7142318 + ... + 7142339.

It is an arithmetic number, because the mean of its divisors is an integer number (42853974).

Almost surely, 2^157131227 is an apocalyptic number.

157131227 is a deficient number, since it is larger than the sum of its proper divisors (14284669).

157131227 is a wasteful number, since it uses less digits than its factorization.

157131227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14284668.

The product of its digits is 2940, while the sum is 29.

The square root of 157131227 is about 12535.1995197524. The cubic root of 157131227 is about 539.6193327674.

Adding to 157131227 its reverse (722131751), we get a palindrome (879262978).

The spelling of 157131227 in words is "one hundred fifty-seven million, one hundred thirty-one thousand, two hundred twenty-seven".