197212870 has 32 divisors (see below), whose sum is σ = 366399936. Its totient is φ = 76377600.

The previous prime is 197212861. The next prime is 197212871. The reversal of 197212870 is 78212791.

197212870 = 20² + 21² + ... + 839².

197212870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197212871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54415 + ... + 57925.

It is an arithmetic number, because the mean of its divisors is an integer number (11449998).

Almost surely, 2^197212870 is an apocalyptic number.

197212870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197212870 is the 7022-nd decagonal number.

197212870 is a deficient number, since it is larger than the sum of its proper divisors (169187066).

197212870 is a wasteful number, since it uses less digits than its factorization.

197212870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3696.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 197212870 is about 14043.2499799726. The cubic root of 197212870 is about 582.0742909302.

The spelling of 197212870 in words is "one hundred ninety-seven million, two hundred twelve thousand, eight hundred seventy".