197015815 has 8 divisors (see below), whose sum is σ = 246698208. Its totient is φ = 150759840.

The previous prime is 197015803. The next prime is 197015849. The reversal of 197015815 is 518510791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 197015815 - 2⁹ = 197015303 is a prime.

It is a super-2 number, since 2×197015815² = 77630462720228450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 856476 + ... + 856705.

It is an arithmetic number, because the mean of its divisors is an integer number (30837276).

Almost surely, 2^197015815 is an apocalyptic number.

197015815 is a deficient number, since it is larger than the sum of its proper divisors (49682393).

197015815 is a wasteful number, since it uses less digits than its factorization.

197015815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713209.

The product of its (nonzero) digits is 12600, while the sum is 37.

The square root of 197015815 is about 14036.2322223594. The cubic root of 197015815 is about 581.8803568772.

The spelling of 197015815 in words is "one hundred ninety-seven million, fifteen thousand, eight hundred fifteen".