73215473 has 2 divisors, whose sum is σ = 73215474. Its totient is φ = 73215472.

The previous prime is 73215469. The next prime is 73215479. The reversal of 73215473 is 37451237.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45252529 + 27962944 = 6727^2 + 5288^2 .

It is a cyclic number.

It is not a de Polignac number, because 73215473 - 2² = 73215469 is a prime.

It is a super-2 number, since 2×73215473² = 10721010973227458, which contains 22 as substring.

It is equal to p_4295912 and since 73215473 and 4295912 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (73215479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36607736 + 36607737.

It is an arithmetic number, because the mean of its divisors is an integer number (36607737).

Almost surely, 2^73215473 is an apocalyptic number.

It is an amenable number.

73215473 is a deficient number, since it is larger than the sum of its proper divisors (1).

73215473 is an equidigital number, since it uses as much as digits as its factorization.

73215473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 32.

The square root of 73215473 is about 8556.6040576855. The cubic root of 73215473 is about 418.3447188039.

The spelling of 73215473 in words is "seventy-three million, two hundred fifteen thousand, four hundred seventy-three".