612715221 has 12 divisors (see below), whose sum is σ = 885661920. Its totient is φ = 408186600.

The previous prime is 612715199. The next prime is 612715247. The reversal of 612715221 is 122517216.

It is not a de Polignac number, because 612715221 - 2⁶ = 612715157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612715261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10401 + ... + 36518.

It is an arithmetic number, because the mean of its divisors is an integer number (73805160).

Almost surely, 2^612715221 is an apocalyptic number.

It is an amenable number.

612715221 is a deficient number, since it is larger than the sum of its proper divisors (272946699).

612715221 is a wasteful number, since it uses less digits than its factorization.

612715221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48376 (or 48373 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 612715221 is about 24753.0850804501. The cubic root of 612715221 is about 849.3490845970.

The spelling of 612715221 in words is "six hundred twelve million, seven hundred fifteen thousand, two hundred twenty-one".