612760221 has 16 divisors (see below), whose sum is σ = 919003520. Its totient is φ = 408505356.

The previous prime is 612760193. The next prime is 612760237. The reversal of 612760221 is 122067216.

It is not a de Polignac number, because 612760221 - 2⁶ = 612760157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612760021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137905 + ... + 142278.

It is an arithmetic number, because the mean of its divisors is an integer number (57437720).

Almost surely, 2^612760221 is an apocalyptic number.

It is an amenable number.

612760221 is a deficient number, since it is larger than the sum of its proper divisors (306243299).

612760221 is an frugal number, since it uses more digits than its factorization.

612760221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280204 (or 280186 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 612760221 is about 24753.9940413663. The cubic root of 612760221 is about 849.3698771675.

The spelling of 612760221 in words is "six hundred twelve million, seven hundred sixty thousand, two hundred twenty-one".