231357545 has 4 divisors (see below), whose sum is σ = 277629060. Its totient is φ = 185086032.

The previous prime is 231357541. The next prime is 231357593. The reversal of 231357545 is 545753132.

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 54361129 + 176996416 = 7373^2 + 13304^2 .

It is a cyclic number.

It is not a de Polignac number, because 231357545 - 2² = 231357541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231357541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23135750 + ... + 23135759.

It is an arithmetic number, because the mean of its divisors is an integer number (69407265).

Almost surely, 2^231357545 is an apocalyptic number.

It is an amenable number.

231357545 is a deficient number, since it is larger than the sum of its proper divisors (46271515).

231357545 is an equidigital number, since it uses as much as digits as its factorization.

231357545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46271514.

The product of its digits is 63000, while the sum is 35.

The square root of 231357545 is about 15210.4419725398. The cubic root of 231357545 is about 613.8956495945.

The spelling of 231357545 in words is "two hundred thirty-one million, three hundred fifty-seven thousand, five hundred forty-five".