626686231 has 4 divisors (see below), whose sum is σ = 626954472. Its totient is φ = 626417992.

The previous prime is 626686183. The next prime is 626686241. The reversal of 626686231 is 132686626.

It is a happy number.

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 626686231 - 2¹⁵ = 626653463 is a prime.

It is a super-2 number, since 2×626686231² = 785471264249970722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626686241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130585 + ... + 135298.

It is an arithmetic number, because the mean of its divisors is an integer number (156738618).

Almost surely, 2^626686231 is an apocalyptic number.

626686231 is a deficient number, since it is larger than the sum of its proper divisors (268241).

626686231 is a wasteful number, since it uses less digits than its factorization.

626686231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268240.

The product of its digits is 124416, while the sum is 40.

The square root of 626686231 is about 25033.7019036338. The cubic root of 626686231 is about 855.7561933940.

The spelling of 626686231 in words is "six hundred twenty-six million, six hundred eighty-six thousand, two hundred thirty-one".