163281157 has 4 divisors (see below), whose sum is σ = 175841260. Its totient is φ = 150721056.

The previous prime is 163281137. The next prime is 163281161. The reversal of 163281157 is 751182361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751182361 = 41 ⋅18321521.

It can be written as a sum of positive squares in 2 ways, for example, as 85858756 + 77422401 = 9266^2 + 8799^2 .

It is a cyclic number.

It is not a de Polignac number, because 163281157 - 2¹⁵ = 163248389 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 (163281137) 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, 6280032 + ... + 6280057.

It is an arithmetic number, because the mean of its divisors is an integer number (43960315).

Almost surely, 2^163281157 is an apocalyptic number.

It is an amenable number.

163281157 is a deficient number, since it is larger than the sum of its proper divisors (12560103).

163281157 is a wasteful number, since it uses less digits than its factorization.

163281157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12560102.

The product of its digits is 10080, while the sum is 34.

The square root of 163281157 is about 12778.1515486396. The cubic root of 163281157 is about 546.5694535561.

The spelling of 163281157 in words is "one hundred sixty-three million, two hundred eighty-one thousand, one hundred fifty-seven".