231401626 has 16 divisors (see below), whose sum is σ = 359651304. Its totient is φ = 111573504.

The previous prime is 231401591. The next prime is 231401699. The reversal of 231401626 is 626104132.

It can be written as a sum of positive squares in 4 ways, for example, as 103734225 + 127667401 = 10185^2 + 11299^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 231401626.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5475 + ... + 22198.

Almost surely, 2^231401626 is an apocalyptic number.

231401626 is a deficient number, since it is larger than the sum of its proper divisors (128249678).

231401626 is a wasteful number, since it uses less digits than its factorization.

231401626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27825.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 231401626 is about 15211.8909409711. The cubic root of 231401626 is about 613.9346360266.

Adding to 231401626 its reverse (626104132), we get a palindrome (857505758).

The spelling of 231401626 in words is "two hundred thirty-one million, four hundred one thousand, six hundred twenty-six".