73221075 has 36 divisors (see below), whose sum is σ = 136858800. Its totient is φ = 37350720.

The previous prime is 73221073. The next prime is 73221089. The reversal of 73221075 is 57012237.

It is not a de Polignac number, because 73221075 - 2¹ = 73221073 is a prime.

It is a super-2 number, since 2×73221075² = 10722651648311250, which contains 22 as substring.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (73221073) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1900 + ... + 12249.

Almost surely, 2^73221075 is an apocalyptic number.

73221075 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

73221075 is a deficient number, since it is larger than the sum of its proper divisors (63637725).

73221075 is a wasteful number, since it uses less digits than its factorization.

73221075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14188 (or 14180 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 73221075 is about 8556.9314009170. The cubic root of 73221075 is about 418.3553882578.

The spelling of 73221075 in words is "seventy-three million, two hundred twenty-one thousand, seventy-five".