73221275545 has 16 divisors (see below), whose sum is σ = 95868226368. Its totient is φ = 53243547840.

The previous prime is 73221275539. The next prime is 73221275551. The reversal of 73221275545 is 54557212237.

It is an interprime number because it is at equal distance from previous prime (73221275539) and next prime (73221275551).

It is not a de Polignac number, because 73221275545 - 2²¹ = 73219178393 is a prime.

It is a super-2 number, since 2×73221275545² (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 15 ways as a sum of consecutive naturals, for example, 264742 + ... + 465328.

It is an arithmetic number, because the mean of its divisors is an integer number (5991764148).

Almost surely, 2^73221275545 is an apocalyptic number.

It is an amenable number.

73221275545 is a deficient number, since it is larger than the sum of its proper divisors (22646950823).

73221275545 is a wasteful number, since it uses less digits than its factorization.

73221275545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207240.

The product of its digits is 588000, while the sum is 43.

The spelling of 73221275545 in words is "seventy-three billion, two hundred twenty-one million, two hundred seventy-five thousand, five hundred forty-five".