197881431 has 8 divisors (see below), whose sum is σ = 287827584. Its totient is φ = 119928120.

The previous prime is 197881429. The next prime is 197881441. The reversal of 197881431 is 134188791.

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

It is not a de Polignac number, because 197881431 - 2¹ = 197881429 is a prime.

It is a super-2 number, since 2×197881431² = 78314121469215522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197881441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2998171 + ... + 2998236.

It is an arithmetic number, because the mean of its divisors is an integer number (35978448).

Almost surely, 2^197881431 is an apocalyptic number.

197881431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

197881431 is a deficient number, since it is larger than the sum of its proper divisors (89946153).

197881431 is a wasteful number, since it uses less digits than its factorization.

197881431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996421.

The product of its digits is 48384, while the sum is 42.

The square root of 197881431 is about 14067.0334825790. The cubic root of 197881431 is about 582.7313022234.

The spelling of 197881431 in words is "one hundred ninety-seven million, eight hundred eighty-one thousand, four hundred thirty-one".