71543427 has 16 divisors (see below), whose sum is σ = 97789440. Its totient is φ = 46511712.

The previous prime is 71543399. The next prime is 71543441. The reversal of 71543427 is 72434517.

It is not a de Polignac number, because 71543427 - 2¹⁸ = 71281283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71543467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17853 + ... + 21489.

It is an arithmetic number, because the mean of its divisors is an integer number (6111840).

Almost surely, 2^71543427 is an apocalyptic number.

71543427 is a deficient number, since it is larger than the sum of its proper divisors (26246013).

71543427 is a wasteful number, since it uses less digits than its factorization.

71543427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3802.

The product of its digits is 23520, while the sum is 33.

The square root of 71543427 is about 8458.3347651887. The cubic root of 71543427 is about 415.1355380581.

The spelling of 71543427 in words is "seventy-one million, five hundred forty-three thousand, four hundred twenty-seven".