197220051 has 18 divisors (see below), whose sum is σ = 331384092. Its totient is φ = 112696920.

The previous prime is 197220031. The next prime is 197220073. The reversal of 197220051 is 150022791.

It is not a de Polignac number, because 197220051 - 2²⁶ = 130111187 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197219997 and 197220024.

It is not an unprimeable number, because it can be changed into a prime (197220031) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 223165 + ... + 224046.

Almost surely, 2^197220051 is an apocalyptic number.

197220051 is a deficient number, since it is larger than the sum of its proper divisors (134164041).

197220051 is a wasteful number, since it uses less digits than its factorization.

197220051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447231 (or 447221 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 197220051 is about 14043.5056520799. The cubic root of 197220051 is about 582.0813557578.

The spelling of 197220051 in words is "one hundred ninety-seven million, two hundred twenty thousand, fifty-one".