71418431 has 8 divisors (see below), whose sum is σ = 83287200. Its totient is φ = 61215504.

The previous prime is 71418409. The next prime is 71418463. The reversal of 71418431 is 13481417.

It is not a de Polignac number, because 71418431 - 2¹⁴ = 71402047 is a prime.

It is a super-2 number, since 2×71418431² = 10201184573003522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71418394 and 71418403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71418031) 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, 103766 + ... + 104451.

It is an arithmetic number, because the mean of its divisors is an integer number (10410900).

Almost surely, 2^71418431 is an apocalyptic number.

71418431 is a deficient number, since it is larger than the sum of its proper divisors (11868769).

71418431 is an equidigital number, since it uses as much as digits as its factorization.

71418431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208238 (or 208224 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 71418431 is about 8450.9426101471. The cubic root of 71418431 is about 414.8936312283.

Adding to 71418431 its reverse (13481417), we get a palindrome (84899848).

The spelling of 71418431 in words is "seventy-one million, four hundred eighteen thousand, four hundred thirty-one".