231707545 has 4 divisors (see below), whose sum is σ = 278049060. Its totient is φ = 185366032.

The previous prime is 231707533. The next prime is 231707551. The reversal of 231707545 is 545707132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 111344704 + 120362841 = 10552^2 + 10971^2 .

It is a cyclic number.

It is not a de Polignac number, because 231707545 - 2⁷ = 231707417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231707545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23170750 + ... + 23170759.

It is an arithmetic number, because the mean of its divisors is an integer number (69512265).

Almost surely, 2^231707545 is an apocalyptic number.

It is an amenable number.

231707545 is a deficient number, since it is larger than the sum of its proper divisors (46341515).

231707545 is an equidigital number, since it uses as much as digits as its factorization.

231707545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46341514.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 231707545 is about 15221.9428786210. The cubic root of 231707545 is about 614.2050627716.

The spelling of 231707545 in words is "two hundred thirty-one million, seven hundred seven thousand, five hundred forty-five".