72225005 has 4 divisors (see below), whose sum is σ = 86670012. Its totient is φ = 57780000.

The previous prime is 72224989. The next prime is 72225029. The reversal of 72225005 is 50052227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50052227 = 47 ⋅1064941.

It can be written as a sum of positive squares in 2 ways, for example, as 32924644 + 39300361 = 5738^2 + 6269^2 .

It is not a de Polignac number, because 72225005 - 2⁴ = 72224989 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 3 ways as a sum of consecutive naturals, for example, 7222496 + ... + 7222505.

It is an arithmetic number, because the mean of its divisors is an integer number (21667503).

Almost surely, 2^72225005 is an apocalyptic number.

It is an amenable number.

72225005 is a deficient number, since it is larger than the sum of its proper divisors (14445007).

72225005 is a wasteful number, since it uses less digits than its factorization.

72225005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14445006.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 72225005 is about 8498.5295786977. The cubic root of 72225005 is about 416.4496743918.

The spelling of 72225005 in words is "seventy-two million, two hundred twenty-five thousand, five".