611686331 has 8 divisors (see below), whose sum is σ = 628664400. Its totient is φ = 594731808.

The previous prime is 611686297. The next prime is 611686343. The reversal of 611686331 is 133686116.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 611686331 - 2⁶ = 611686267 is a prime.

It is a super-2 number, since 2×611686331² = 748320335064483122, 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 = 611686291 and 611686300.

It is not an unprimeable number, because it can be changed into a prime (611686631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55520 + ... + 65618.

It is an arithmetic number, because the mean of its divisors is an integer number (78583050).

Almost surely, 2^611686331 is an apocalyptic number.

611686331 is a deficient number, since it is larger than the sum of its proper divisors (16978069).

611686331 is a wasteful number, since it uses less digits than its factorization.

611686331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11773.

The product of its digits is 15552, while the sum is 35.

The square root of 611686331 is about 24732.2932822656. The cubic root of 611686331 is about 848.8734006475.

The spelling of 611686331 in words is "six hundred eleven million, six hundred eighty-six thousand, three hundred thirty-one".