231261426 has 128 divisors (see below), whose sum is σ = 610099200. Its totient is φ = 64152000.

The previous prime is 231261397. The next prime is 231261449. The reversal of 231261426 is 624162132.

231261426 is a `hidden beast` number, since 23 + 1 + 2 + 614 + 26 = 666.

231261426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 231261426.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 349536 + ... + 350196.

It is an arithmetic number, because the mean of its divisors is an integer number (4766400).

Almost surely, 2^231261426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231261426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305049600).

231261426 is an abundant number, since it is smaller than the sum of its proper divisors (378837774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231261426 is a wasteful number, since it uses less digits than its factorization.

231261426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733 (or 727 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 231261426 is about 15207.2820056708. The cubic root of 231261426 is about 613.8106221687.

The spelling of 231261426 in words is "two hundred thirty-one million, two hundred sixty-one thousand, four hundred twenty-six".