612221672 has 8 divisors (see below), whose sum is σ = 1147915650. Its totient is φ = 306110832.

The previous prime is 612221651. The next prime is 612221677. The reversal of 612221672 is 276122216.

It is a happy number.

612221672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 575328196 + 36893476 = 23986^2 + 6074^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (612221677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38263847 + ... + 38263862.

Almost surely, 2^612221672 is an apocalyptic number.

It is an amenable number.

612221672 is a deficient number, since it is larger than the sum of its proper divisors (535693978).

612221672 is a wasteful number, since it uses less digits than its factorization.

612221672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76527715 (or 76527711 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 612221672 is about 24743.1136278359. The cubic root of 612221672 is about 849.1209699238.

Adding to 612221672 its reverse (276122216), we get a palindrome (888343888).

The spelling of 612221672 in words is "six hundred twelve million, two hundred twenty-one thousand, six hundred seventy-two".