612211231 has 4 divisors (see below), whose sum is σ = 613163992. Its totient is φ = 611258472.

The previous prime is 612211181. The next prime is 612211261. The reversal of 612211231 is 132112216.

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

It is a cyclic number.

It is not a de Polignac number, because 612211231 - 2²¹ = 610114079 is a prime.

It is a super-2 number, since 2×612211231² = 749605182725070722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 612211199 and 612211208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612211261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475416 + ... + 476701.

It is an arithmetic number, because the mean of its divisors is an integer number (153290998).

Almost surely, 2^612211231 is an apocalyptic number.

612211231 is a deficient number, since it is larger than the sum of its proper divisors (952761).

612211231 is an equidigital number, since it uses as much as digits as its factorization.

612211231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952760.

The product of its digits is 144, while the sum is 19.

The square root of 612211231 is about 24742.9026389387. The cubic root of 612211231 is about 849.1161428474.

Adding to 612211231 its reverse (132112216), we get a palindrome (744323447).

The spelling of 612211231 in words is "six hundred twelve million, two hundred eleven thousand, two hundred thirty-one".