97163181 has 12 divisors (see below), whose sum is σ = 140509980. Its totient is φ = 64700160.

The previous prime is 97163173. The next prime is 97163189. The reversal of 97163181 is 18136179.

It is an interprime number because it is at equal distance from previous prime (97163173) and next prime (97163189).

It can be written as a sum of positive squares in 2 ways, for example, as 4137156 + 93026025 = 2034^2 + 9645^2 .

It is not a de Polignac number, because 97163181 - 2³ = 97163173 is a prime.

It is a super-2 number, since 2×97163181² = 18881367484077522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97163189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2551 + ... + 14171.

It is an arithmetic number, because the mean of its divisors is an integer number (11709165).

Almost surely, 2^97163181 is an apocalyptic number.

It is an amenable number.

97163181 is a deficient number, since it is larger than the sum of its proper divisors (43346799).

97163181 is a wasteful number, since it uses less digits than its factorization.

97163181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12556 (or 12553 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 97163181 is about 9857.1385807444. The cubic root of 97163181 is about 459.7275970693.

It can be divided in two parts, 97163 and 181, that added together give a square (97344 = 312²).

The spelling of 97163181 in words is "ninety-seven million, one hundred sixty-three thousand, one hundred eighty-one".