71220283 has 4 divisors (see below), whose sum is σ = 71335960. Its totient is φ = 71104608.

The previous prime is 71220269. The next prime is 71220319. The reversal of 71220283 is 38202217.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71220283 - 2²⁵ = 37665851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71220223) 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, 56910 + ... + 58147.

It is an arithmetic number, because the mean of its divisors is an integer number (17833990).

Almost surely, 2^71220283 is an apocalyptic number.

71220283 is a deficient number, since it is larger than the sum of its proper divisors (115677).

71220283 is a wasteful number, since it uses less digits than its factorization.

71220283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115676.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 71220283 is about 8439.2110413237. The cubic root of 71220283 is about 414.5095730824.

The spelling of 71220283 in words is "seventy-one million, two hundred twenty thousand, two hundred eighty-three".