71421223 has 4 divisors (see below), whose sum is σ = 71438680. Its totient is φ = 71403768.

The previous prime is 71421193. The next prime is 71421227. The reversal of 71421223 is 32212417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32212417 = 29 ⋅1110773.

It is a cyclic number.

It is not a de Polignac number, because 71421223 - 2⁵ = 71421191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71421194 and 71421203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71421227) 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, 1093 + ... + 12001.

It is an arithmetic number, because the mean of its divisors is an integer number (17859670).

Almost surely, 2^71421223 is an apocalyptic number.

71421223 is a deficient number, since it is larger than the sum of its proper divisors (17457).

71421223 is a wasteful number, since it uses less digits than its factorization.

71421223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17456.

The product of its digits is 672, while the sum is 22.

The square root of 71421223 is about 8451.1077972062. The cubic root of 71421223 is about 414.8990377128.

The spelling of 71421223 in words is "seventy-one million, four hundred twenty-one thousand, two hundred twenty-three".