197212481 has 4 divisors (see below), whose sum is σ = 197335764. Its totient is φ = 197089200.

The previous prime is 197212453. The next prime is 197212489. The reversal of 197212481 is 184212791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184212791 = 7 ⋅26316113.

It can be written as a sum of positive squares in 2 ways, for example, as 139452481 + 57760000 = 11809^2 + 7600^2 .

It is a cyclic number.

It is not a de Polignac number, because 197212481 - 2¹⁰ = 197211457 is a prime.

It is a super-2 number, since 2×197212481² = 77785525324350722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197212489) 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, 59210 + ... + 62451.

It is an arithmetic number, because the mean of its divisors is an integer number (49333941).

Almost surely, 2^197212481 is an apocalyptic number.

It is an amenable number.

197212481 is a deficient number, since it is larger than the sum of its proper divisors (123283).

197212481 is a wasteful number, since it uses less digits than its factorization.

197212481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123282.

The product of its digits is 8064, while the sum is 35.

The square root of 197212481 is about 14043.2361298954. The cubic root of 197212481 is about 582.0739082185.

The spelling of 197212481 in words is "one hundred ninety-seven million, two hundred twelve thousand, four hundred eighty-one".