197125551 has 24 divisors (see below), whose sum is σ = 342542720. Its totient is φ = 106713936.

The previous prime is 197125547. The next prime is 197125553. The reversal of 197125551 is 155521791.

197125551 is a `hidden beast` number, since 1 + 97 + 12 + 5 + 551 = 666.

It is not a de Polignac number, because 197125551 - 2² = 197125547 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 (197125553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81145 + ... + 83538.

Almost surely, 2^197125551 is an apocalyptic number.

197125551 is a deficient number, since it is larger than the sum of its proper divisors (145417169).

197125551 is a wasteful number, since it uses less digits than its factorization.

197125551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164715 (or 164712 counting only the distinct ones).

The product of its digits is 15750, while the sum is 36.

The square root of 197125551 is about 14040.1407044232. The cubic root of 197125551 is about 581.9883708308.

The spelling of 197125551 in words is "one hundred ninety-seven million, one hundred twenty-five thousand, five hundred fifty-one".