626144231 has 4 divisors (see below), whose sum is σ = 646342464. Its totient is φ = 605946000.

The previous prime is 626144227. The next prime is 626144273. The reversal of 626144231 is 132441626.

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 626144231 - 2² = 626144227 is a prime.

It is a super-2 number, since 2×626144231² = 784113196029162722, 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 = 626144194 and 626144203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626144291) 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, 10099070 + ... + 10099131.

It is an arithmetic number, because the mean of its divisors is an integer number (161585616).

Almost surely, 2^626144231 is an apocalyptic number.

626144231 is a deficient number, since it is larger than the sum of its proper divisors (20198233).

626144231 is a wasteful number, since it uses less digits than its factorization.

626144231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20198232.

The product of its digits is 6912, while the sum is 29.

The square root of 626144231 is about 25022.8741554602. The cubic root of 626144231 is about 855.5094172498.

Adding to 626144231 its reverse (132441626), we get a palindrome (758585857).

The spelling of 626144231 in words is "six hundred twenty-six million, one hundred forty-four thousand, two hundred thirty-one".