197388550 has 12 divisors (see below), whose sum is σ = 367142796. Its totient is φ = 78955400.

The previous prime is 197388539. The next prime is 197388551. The reversal of 197388550 is 55883791.

197388550 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 2×197388550² = 77924479342205000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 197388550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197388551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1973836 + ... + 1973935.

It is an arithmetic number, because the mean of its divisors is an integer number (30595233).

Almost surely, 2^197388550 is an apocalyptic number.

197388550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197388550 is a deficient number, since it is larger than the sum of its proper divisors (169754246).

197388550 is a wasteful number, since it uses less digits than its factorization.

197388550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947783 (or 3947778 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 197388550 is about 14049.5035499479. The cubic root of 197388550 is about 582.2470796229.

The spelling of 197388550 in words is "one hundred ninety-seven million, three hundred eighty-eight thousand, five hundred fifty".