612116217 has 16 divisors (see below), whose sum is σ = 954568000. Its totient is φ = 386599392.

The previous prime is 612116213. The next prime is 612116231. The reversal of 612116217 is 712611216.

It is a happy number.

It is not a de Polignac number, because 612116217 - 2² = 612116213 is a prime.

It is a super-2 number, since 2×612116217² = 749372526228782178, which contains 22 as substring.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612116213) 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, 596092 + ... + 597117.

It is an arithmetic number, because the mean of its divisors is an integer number (59660500).

Almost surely, 2^612116217 is an apocalyptic number.

It is an amenable number.

612116217 is a deficient number, since it is larger than the sum of its proper divisors (342451783).

612116217 is a wasteful number, since it uses less digits than its factorization.

612116217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193237 (or 1193231 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 612116217 is about 24740.9825390990. The cubic root of 612116217 is about 849.0722135132.

The spelling of 612116217 in words is "six hundred twelve million, one hundred sixteen thousand, two hundred seventeen".