197715540 has 48 divisors (see below), whose sum is σ = 603933120. Its totient is φ = 47930880.

The previous prime is 197715509. The next prime is 197715587. The reversal of 197715540 is 45517791.

197715540 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149125 + ... + 150444.

It is an arithmetic number, because the mean of its divisors is an integer number (12581940).

Almost surely, 2^197715540 is an apocalyptic number.

197715540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197715540 is an abundant number, since it is smaller than the sum of its proper divisors (406217580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197715540 is a wasteful number, since it uses less digits than its factorization.

197715540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299592 (or 299590 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 39.

The square root of 197715540 is about 14061.1358004963. The cubic root of 197715540 is about 582.5684152790.

The spelling of 197715540 in words is "one hundred ninety-seven million, seven hundred fifteen thousand, five hundred forty".