72224775 has 54 divisors (see below), whose sum is σ = 150505992. Its totient is φ = 33012000.

The previous prime is 72224767. The next prime is 72224827. The reversal of 72224775 is 57742227.

It is not a de Polignac number, because 72224775 - 2³ = 72224767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 7750 + ... + 14300.

It is an arithmetic number, because the mean of its divisors is an integer number (2787148).

Almost surely, 2^72224775 is an apocalyptic number.

72224775 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

72224775 is an abundant number, since it is smaller than the sum of its proper divisors (78281217).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72224775 is a wasteful number, since it uses less digits than its factorization.

72224775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6581 (or 6566 counting only the distinct ones).

The product of its digits is 54880, while the sum is 36.

The square root of 72224775 is about 8498.5160469343. The cubic root of 72224775 is about 416.4492323311.

The spelling of 72224775 in words is "seventy-two million, two hundred twenty-four thousand, seven hundred seventy-five".