612218245 has 4 divisors (see below), whose sum is σ = 734661900. Its totient is φ = 489774592.

The previous prime is 612218239. The next prime is 612218291. The reversal of 612218245 is 542812216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 268894404 + 343323841 = 16398^2 + 18529^2 .

It is a cyclic number.

It is not a de Polignac number, because 612218245 - 2⁵ = 612218213 is a prime.

It is a super-2 number, since 2×612218245² = 749622359021760050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61221820 + ... + 61221829.

It is an arithmetic number, because the mean of its divisors is an integer number (183665475).

Almost surely, 2^612218245 is an apocalyptic number.

It is an amenable number.

612218245 is a deficient number, since it is larger than the sum of its proper divisors (122443655).

612218245 is a wasteful number, since it uses less digits than its factorization.

612218245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122443654.

The product of its digits is 7680, while the sum is 31.

The square root of 612218245 is about 24743.0443761474. The cubic root of 612218245 is about 849.1193855614.

The spelling of 612218245 in words is "six hundred twelve million, two hundred eighteen thousand, two hundred forty-five".