157811229 has 6 divisors (see below), whose sum is σ = 227949566. Its totient is φ = 105207480.

The previous prime is 157811191. The next prime is 157811239. The reversal of 157811229 is 922118751.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 89302500 + 68508729 = 9450^2 + 8277^2 .

It is not a de Polignac number, because 157811229 - 2²⁰ = 156762653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157811193 and 157811202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157811239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8767282 + ... + 8767299.

Almost surely, 2^157811229 is an apocalyptic number.

It is an amenable number.

157811229 is a deficient number, since it is larger than the sum of its proper divisors (70138337).

157811229 is a wasteful number, since it uses less digits than its factorization.

157811229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17534587 (or 17534584 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 157811229 is about 12562.2939386085. The cubic root of 157811229 is about 540.3966324686.

The spelling of 157811229 in words is "one hundred fifty-seven million, eight hundred eleven thousand, two hundred twenty-nine".