71872431 has 8 divisors (see below), whose sum is σ = 95905200. Its totient is φ = 47877312.

The previous prime is 71872429. The next prime is 71872453. The reversal of 71872431 is 13427817.

It is a happy number.

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

It is not a de Polignac number, because 71872431 - 2¹ = 71872429 is a prime.

It is a super-2 number, since 2×71872431² = 10331292675699522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71872392 and 71872401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71872531) 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, 4606 + ... + 12843.

It is an arithmetic number, because the mean of its divisors is an integer number (11988150).

Almost surely, 2^71872431 is an apocalyptic number.

71872431 is a deficient number, since it is larger than the sum of its proper divisors (24032769).

71872431 is a wasteful number, since it uses less digits than its factorization.

71872431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18825.

The product of its digits is 9408, while the sum is 33.

The square root of 71872431 is about 8477.7609661986. The cubic root of 71872431 is about 415.7709210130.

The spelling of 71872431 in words is "seventy-one million, eight hundred seventy-two thousand, four hundred thirty-one".