47197431 has 8 divisors (see below), whose sum is σ = 69922160. Its totient is φ = 31464936.

The previous prime is 47197429. The next prime is 47197439. The reversal of 47197431 is 13479174.

It is not a de Polignac number, because 47197431 - 2¹ = 47197429 is a prime.

It is a super-2 number, since 2×47197431² = 4455194985999522, which 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 (47197439) 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, 874000 + ... + 874053.

It is an arithmetic number, because the mean of its divisors is an integer number (8740270).

Almost surely, 2^47197431 is an apocalyptic number.

47197431 is a deficient number, since it is larger than the sum of its proper divisors (22724729).

47197431 is a wasteful number, since it uses less digits than its factorization.

47197431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748062 (or 1748056 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 47197431 is about 6870.0386461795. The cubic root of 47197431 is about 361.3872171026.

The spelling of 47197431 in words is "forty-seven million, one hundred ninety-seven thousand, four hundred thirty-one".