197156450 has 12 divisors (see below), whose sum is σ = 366711090. Its totient is φ = 78862560.

The previous prime is 197156447. The next prime is 197156459. The reversal of 197156450 is 54651791.

It can be written as a sum of positive squares in 3 ways, for example, as 177875569 + 19280881 = 13337^2 + 4391^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (197156459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1971515 + ... + 1971614.

Almost surely, 2^197156450 is an apocalyptic number.

197156450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197156450 is a deficient number, since it is larger than the sum of its proper divisors (169554640).

197156450 is a wasteful number, since it uses less digits than its factorization.

197156450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3943141 (or 3943136 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 197156450 is about 14041.2410420162. The cubic root of 197156450 is about 582.0187777112.

The spelling of 197156450 in words is "one hundred ninety-seven million, one hundred fifty-six thousand, four hundred fifty".