231356945061 has 40 divisors (see below), whose sum is σ = 396869642400. Its totient is φ = 132836513760.

The previous prime is 231356945047. The next prime is 231356945069. The reversal of 231356945061 is 160549653132.

231356945061 is a `hidden beast` number, since 2 + 3 + 1 + 3 + 56 + 94 + 506 + 1 = 666.

It is not a de Polignac number, because 231356945061 - 2¹⁹ = 231356420773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231356944998 and 231356945016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231356945069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6816226 + ... + 6850083.

It is an arithmetic number, because the mean of its divisors is an integer number (9921741060).

Almost surely, 2^231356945061 is an apocalyptic number.

It is an amenable number.

231356945061 is a deficient number, since it is larger than the sum of its proper divisors (165512697339).

231356945061 is a wasteful number, since it uses less digits than its factorization.

231356945061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13666351 (or 13666342 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 231356945061 in words is "two hundred thirty-one billion, three hundred fifty-six million, nine hundred forty-five thousand, sixty-one".