71224429 has 4 divisors (see below), whose sum is σ = 71283520. Its totient is φ = 71165340.

The previous prime is 71224423. The next prime is 71224471. The reversal of 71224429 is 92442217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71224429 - 2⁹ = 71223917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71224429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71224423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27699 + ... + 30160.

It is an arithmetic number, because the mean of its divisors is an integer number (17820880).

Almost surely, 2^71224429 is an apocalyptic number.

It is an amenable number.

71224429 is a deficient number, since it is larger than the sum of its proper divisors (59091).

71224429 is a wasteful number, since it uses less digits than its factorization.

71224429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59090.

The product of its digits is 8064, while the sum is 31.

The square root of 71224429 is about 8439.4566768246. The cubic root of 71224429 is about 414.5176163124.

The spelling of 71224429 in words is "seventy-one million, two hundred twenty-four thousand, four hundred twenty-nine".