71513223 has 4 divisors (see below), whose sum is σ = 95350968. Its totient is φ = 47675480.

The previous prime is 71513219. The next prime is 71513227. The reversal of 71513223 is 32231517.

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

It is an interprime number because it is at equal distance from previous prime (71513219) and next prime (71513227).

It is a cyclic number.

It is not a de Polignac number, because 71513223 - 2² = 71513219 is a prime.

It is a super-2 number, since 2×71513223² = 10228282127695458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71513193 and 71513202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71513227) 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 3 ways as a sum of consecutive naturals, for example, 11918868 + ... + 11918873.

It is an arithmetic number, because the mean of its divisors is an integer number (23837742).

Almost surely, 2^71513223 is an apocalyptic number.

71513223 is a deficient number, since it is larger than the sum of its proper divisors (23837745).

71513223 is a wasteful number, since it uses less digits than its factorization.

71513223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23837744.

The product of its digits is 1260, while the sum is 24.

The square root of 71513223 is about 8456.5491188782. The cubic root of 71513223 is about 415.0771095890.

The spelling of 71513223 in words is "seventy-one million, five hundred thirteen thousand, two hundred twenty-three".