611257213 has 16 divisors (see below), whose sum is σ = 714313600. Its totient is φ = 522849600.

The previous prime is 611257187. The next prime is 611257243. The reversal of 611257213 is 312752116.

It is a happy number.

It is not a de Polignac number, because 611257213 - 2⁵ = 611257181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611257243) 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 15 ways as a sum of consecutive naturals, for example, 194293 + ... + 197413.

It is an arithmetic number, because the mean of its divisors is an integer number (44644600).

Almost surely, 2^611257213 is an apocalyptic number.

It is an amenable number.

611257213 is a deficient number, since it is larger than the sum of its proper divisors (103056387).

611257213 is an equidigital number, since it uses as much as digits as its factorization.

611257213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3713 (or 3699 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

The square root of 611257213 is about 24723.6165032545. The cubic root of 611257213 is about 848.6748500438.

The spelling of 611257213 in words is "six hundred eleven million, two hundred fifty-seven thousand, two hundred thirteen".