197217190 has 16 divisors (see below), whose sum is σ = 358439328. Its totient is φ = 78120576.

The previous prime is 197217179. The next prime is 197217193. The reversal of 197217190 is 91712791.

197217190 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×197217190² = 77789240062992200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197217193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94707 + ... + 96766.

It is an arithmetic number, because the mean of its divisors is an integer number (22402458).

Almost surely, 2^197217190 is an apocalyptic number.

197217190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197217190 is a deficient number, since it is larger than the sum of its proper divisors (161222138).

197217190 is a wasteful number, since it uses less digits than its factorization.

197217190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191583.

The product of its (nonzero) digits is 7938, while the sum is 37.

The square root of 197217190 is about 14043.4037896801. The cubic root of 197217190 is about 582.0785410629.

The spelling of 197217190 in words is "one hundred ninety-seven million, two hundred seventeen thousand, one hundred ninety".