231352021045 has 8 divisors (see below), whose sum is σ = 278013998520. Its totient is φ = 184820568000.

The previous prime is 231352021027. The next prime is 231352021049. The reversal of 231352021045 is 540120253132.

It can be written as a sum of positive squares in 4 ways, for example, as 54508689 + 231297512356 = 7383^2 + 480934^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-231352021045 is a prime.

It is a super-2 number, since 2×231352021045² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231352021049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32627206 + ... + 32634295.

It is an arithmetic number, because the mean of its divisors is an integer number (34751749815).

Almost surely, 2^231352021045 is an apocalyptic number.

It is an amenable number.

231352021045 is a deficient number, since it is larger than the sum of its proper divisors (46661977475).

231352021045 is an equidigital number, since it uses as much as digits as its factorization.

231352021045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65262215.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 231352021045 its reverse (540120253132), we get a palindrome (771472274177).

The spelling of 231352021045 in words is "two hundred thirty-one billion, three hundred fifty-two million, twenty-one thousand, forty-five".