73331421 has 16 divisors (see below), whose sum is σ = 105732864. Its totient is φ = 45031424.

The previous prime is 73331417. The next prime is 73331437. The reversal of 73331421 is 12413337.

73331421 = 329² + 330² + ... + 634².

It is a cyclic number.

It is not a de Polignac number, because 73331421 - 2² = 73331417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 73331391 and 73331400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73331471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12900 + ... + 17693.

It is an arithmetic number, because the mean of its divisors is an integer number (6608304).

Almost surely, 2^73331421 is an apocalyptic number.

It is an amenable number.

73331421 is a deficient number, since it is larger than the sum of its proper divisors (32401443).

73331421 is a wasteful number, since it uses less digits than its factorization.

73331421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30660.

The product of its digits is 1512, while the sum is 24.

The square root of 73331421 is about 8563.3767288378. The cubic root of 73331421 is about 418.5654401363.

Adding to 73331421 its reverse (12413337), we get a palindrome (85744758).

The spelling of 73331421 in words is "seventy-three million, three hundred thirty-one thousand, four hundred twenty-one".