71323021 has 8 divisors (see below), whose sum is σ = 88922304. Its totient is φ = 55576320.

The previous prime is 71323009. The next prime is 71323051. The reversal of 71323021 is 12032317.

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

It is a cyclic number.

It is not a de Polignac number, because 71323021 - 2¹¹ = 71320973 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 71323021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71323051) 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, 463060 + ... + 463213.

It is an arithmetic number, because the mean of its divisors is an integer number (11115288).

Almost surely, 2^71323021 is an apocalyptic number.

It is an amenable number.

71323021 is a deficient number, since it is larger than the sum of its proper divisors (17599283).

71323021 is a wasteful number, since it uses less digits than its factorization.

71323021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926291.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 71323021 is about 8445.2957911491. The cubic root of 71323021 is about 414.7087926580.

Adding to 71323021 its reverse (12032317), we get a palindrome (83355338).

It can be divided in two parts, 7132 and 3021, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 71323021 in words is "seventy-one million, three hundred twenty-three thousand, twenty-one".