231261406 has 8 divisors (see below), whose sum is σ = 351071784. Its totient is φ = 114237480.

The previous prime is 231261397. The next prime is 231261449. The reversal of 231261406 is 604162132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696405 + ... + 696736.

It is an arithmetic number, because the mean of its divisors is an integer number (43883973).

Almost surely, 2^231261406 is an apocalyptic number.

231261406 is a deficient number, since it is larger than the sum of its proper divisors (119810378).

231261406 is a wasteful number, since it uses less digits than its factorization.

231261406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393226.

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

The square root of 231261406 is about 15207.2813480911. The cubic root of 231261406 is about 613.8106044742.

The spelling of 231261406 in words is "two hundred thirty-one million, two hundred sixty-one thousand, four hundred six".