71225515 has 4 divisors (see below), whose sum is σ = 85470624. Its totient is φ = 56980408.

The previous prime is 71225477. The next prime is 71225519. The reversal of 71225515 is 51552217.

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 71225515 - 2¹⁵ = 71192747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71225519) 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, 7122547 + ... + 7122556.

It is an arithmetic number, because the mean of its divisors is an integer number (21367656).

Almost surely, 2^71225515 is an apocalyptic number.

71225515 is a deficient number, since it is larger than the sum of its proper divisors (14245109).

71225515 is a wasteful number, since it uses less digits than its factorization.

71225515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14245108.

The product of its digits is 3500, while the sum is 28.

The square root of 71225515 is about 8439.5210172142. The cubic root of 71225515 is about 414.5197230981.

The spelling of 71225515 in words is "seventy-one million, two hundred twenty-five thousand, five hundred fifteen".