73221654025 has 81 divisors (see below), whose sum is σ = 103347758367. Its totient is φ = 51434697600.

The previous prime is 73221654019. The next prime is 73221654047. The reversal of 73221654025 is 52045612237.

The square root of 73221654025 is 270595.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 60644480121 + 12577173904 = 246261^2 + 112148^2 .

It is not a de Polignac number, because 73221654025 - 2¹⁵ = 73221621257 is a prime.

It is a super-2 number, since 2×73221654025² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 404539435 + ... + 404539615.

Almost surely, 2^73221654025 is an apocalyptic number.

73221654025 is the 270595-th square number.

73221654025 is the 135298-th centered octagonal number.

It is an amenable number.

73221654025 is a deficient number, since it is larger than the sum of its proper divisors (30126104342).

73221654025 is a wasteful number, since it uses less digits than its factorization.

73221654025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 73221654025 in words is "seventy-three billion, two hundred twenty-one million, six hundred fifty-four thousand, twenty-five".