231020026 has 4 divisors (see below), whose sum is σ = 346530042. Its totient is φ = 115510012.

The previous prime is 231019991. The next prime is 231020047. The reversal of 231020026 is 620020132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 228463225 + 2556801 = 15115^2 + 1599^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231019991 and 231020009.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57755005 + ... + 57755008.

Almost surely, 2^231020026 is an apocalyptic number.

231020026 is a deficient number, since it is larger than the sum of its proper divisors (115510016).

231020026 is a wasteful number, since it uses less digits than its factorization.

231020026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115510015.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231020026 is about 15199.3429463250. The cubic root of 231020026 is about 613.5969743888.

Adding to 231020026 its reverse (620020132), we get a palindrome (851040158).

The spelling of 231020026 in words is "two hundred thirty-one million, twenty thousand, twenty-six".