197512813381 has 32 divisors (see below), whose sum is σ = 217806962688. Its totient is φ = 178002982080.

The previous prime is 197512813373. The next prime is 197512813397. The reversal of 197512813381 is 183318215791.

It is a cyclic number.

It is not a de Polignac number, because 197512813381 - 2³ = 197512813373 is a prime.

It is a super-2 number, since 2×197512813381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197512813181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80060710 + ... + 80063176.

It is an arithmetic number, because the mean of its divisors is an integer number (6806467584).

Almost surely, 2^197512813381 is an apocalyptic number.

It is an amenable number.

197512813381 is a deficient number, since it is larger than the sum of its proper divisors (20294149307).

197512813381 is a wasteful number, since it uses less digits than its factorization.

197512813381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361.

The product of its digits is 362880, while the sum is 49.

The spelling of 197512813381 in words is "one hundred ninety-seven billion, five hundred twelve million, eight hundred thirteen thousand, three hundred eighty-one".