197228645 has 32 divisors (see below), whose sum is σ = 266716800. Its totient is φ = 139124736.

The previous prime is 197228639. The next prime is 197228653. The reversal of 197228645 is 546822791.

It is a happy number.

197228645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 197228645 - 2¹⁰ = 197227621 is a prime.

It is a super-3 number, since 3×197228645³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 197228596 and 197228605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156026 + ... + 157284.

It is an arithmetic number, because the mean of its divisors is an integer number (8334900).

Almost surely, 2^197228645 is an apocalyptic number.

It is an amenable number.

197228645 is a deficient number, since it is larger than the sum of its proper divisors (69488155).

197228645 is a wasteful number, since it uses less digits than its factorization.

197228645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397.

The product of its digits is 241920, while the sum is 44.

The square root of 197228645 is about 14043.8116264780. The cubic root of 197228645 is about 582.0898105008.

The spelling of 197228645 in words is "one hundred ninety-seven million, two hundred twenty-eight thousand, six hundred forty-five".