231906445 has 16 divisors (see below), whose sum is σ = 285124608. Its totient is φ = 181016640.

The previous prime is 231906421. The next prime is 231906463. The reversal of 231906445 is 544609132.

It is a happy number.

It is not a de Polignac number, because 231906445 - 2¹³ = 231898253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231906445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35742 + ... + 41728.

It is an arithmetic number, because the mean of its divisors is an integer number (17820288).

Almost surely, 2^231906445 is an apocalyptic number.

It is an amenable number.

231906445 is a deficient number, since it is larger than the sum of its proper divisors (53218163).

231906445 is a wasteful number, since it uses less digits than its factorization.

231906445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6180.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 231906445 is about 15228.4748087259. The cubic root of 231906445 is about 614.3807590322.

The spelling of 231906445 in words is "two hundred thirty-one million, nine hundred six thousand, four hundred forty-five".