71225815 has 8 divisors (see below), whose sum is σ = 87555888. Its totient is φ = 55590720.

The previous prime is 71225809. The next prime is 71225831. The reversal of 71225815 is 51852217.

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

It is not a de Polignac number, because 71225815 - 2⁵ = 71225783 is a prime.

It is a Duffinian number.

It is a congruent 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, 173517 + ... + 173926.

It is an arithmetic number, because the mean of its divisors is an integer number (10944486).

Almost surely, 2^71225815 is an apocalyptic number.

71225815 is a deficient number, since it is larger than the sum of its proper divisors (16330073).

71225815 is a wasteful number, since it uses less digits than its factorization.

71225815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347489.

The product of its digits is 5600, while the sum is 31.

The square root of 71225815 is about 8439.5387907160. The cubic root of 71225815 is about 414.5203050794.

The spelling of 71225815 in words is "seventy-one million, two hundred twenty-five thousand, eight hundred fifteen".