73213456 has 10 divisors (see below), whose sum is σ = 141851102. Its totient is φ = 36606720.

The previous prime is 73213453. The next prime is 73213457. The reversal of 73213456 is 65431237.

It can be written as a sum of positive squares in only one way, i.e., 58003456 + 15210000 = 7616^2 + 3900^2 .

It is not an unprimeable number, because it can be changed into a prime (73213453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2287905 + ... + 2287936.

Almost surely, 2^73213456 is an apocalyptic number.

It is an amenable number.

73213456 is a deficient number, since it is larger than the sum of its proper divisors (68637646).

73213456 is a wasteful number, since it uses less digits than its factorization.

73213456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4575849 (or 4575843 counting only the distinct ones).

The product of its digits is 15120, while the sum is 31.

The square root of 73213456 is about 8556.4861946946. The cubic root of 73213456 is about 418.3408771340.

The spelling of 73213456 in words is "seventy-three million, two hundred thirteen thousand, four hundred fifty-six".