73222520 has 32 divisors (see below), whose sum is σ = 188287200. Its totient is φ = 25104768.

The previous prime is 73222489. The next prime is 73222537. The reversal of 73222520 is 2522237.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 130475 + ... + 131034.

It is an arithmetic number, because the mean of its divisors is an integer number (5883975).

Almost surely, 2^73222520 is an apocalyptic number.

73222520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

73222520 is an abundant number, since it is smaller than the sum of its proper divisors (115064680).

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

73222520 is a wasteful number, since it uses less digits than its factorization.

73222520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261527 (or 261523 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 73222520 is about 8557.0158349742. The cubic root of 73222520 is about 418.3581402868.

Adding to 73222520 its reverse (2522237), we get a palindrome (75744757).

The spelling of 73222520 in words is "seventy-three million, two hundred twenty-two thousand, five hundred twenty".