72206801 has 4 divisors (see below), whose sum is σ = 72263604. Its totient is φ = 72150000.

The previous prime is 72206779. The next prime is 72206831. The reversal of 72206801 is 10860227.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22137025 + 50069776 = 4705^2 + 7076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72206801 is a prime.

It is a super-2 number, since 2×72206801² = 10427644221307202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72206831) 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, 26450 + ... + 29051.

It is an arithmetic number, because the mean of its divisors is an integer number (18065901).

Almost surely, 2^72206801 is an apocalyptic number.

It is an amenable number.

72206801 is a deficient number, since it is larger than the sum of its proper divisors (56803).

72206801 is a wasteful number, since it uses less digits than its factorization.

72206801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56802.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 72206801 is about 8497.4585023994. The cubic root of 72206801 is about 416.4146833391.

The spelling of 72206801 in words is "seventy-two million, two hundred six thousand, eight hundred one".