71225507 has 4 divisors (see below), whose sum is σ = 73523136. Its totient is φ = 68927880.

The previous prime is 71225477. The next prime is 71225519. The reversal of 71225507 is 70552217.

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

It is not a de Polignac number, because 71225507 - 2¹⁶ = 71159971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71225507.

It is not an unprimeable number, because it can be changed into a prime (71225527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148768 + ... + 1148829.

It is an arithmetic number, because the mean of its divisors is an integer number (18380784).

Almost surely, 2^71225507 is an apocalyptic number.

71225507 is a deficient number, since it is larger than the sum of its proper divisors (2297629).

71225507 is a wasteful number, since it uses less digits than its factorization.

71225507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297628.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 71225507 is about 8439.5205432536. The cubic root of 71225507 is about 414.5197075786.

The spelling of 71225507 in words is "seventy-one million, two hundred twenty-five thousand, five hundred seven".