71223515 has 8 divisors (see below), whose sum is σ = 93238128. Its totient is φ = 51798880.

The previous prime is 71223499. The next prime is 71223527. The reversal of 71223515 is 51532217.

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

It is not a de Polignac number, because 71223515 - 2⁴ = 71223499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647432 + ... + 647541.

It is an arithmetic number, because the mean of its divisors is an integer number (11654766).

Almost surely, 2^71223515 is an apocalyptic number.

71223515 is a deficient number, since it is larger than the sum of its proper divisors (22014613).

71223515 is a wasteful number, since it uses less digits than its factorization.

71223515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294989.

The product of its digits is 2100, while the sum is 26.

The square root of 71223515 is about 8439.4025262456. The cubic root of 71223515 is about 414.5158431814.

The spelling of 71223515 in words is "seventy-one million, two hundred twenty-three thousand, five hundred fifteen".