231699445 has 8 divisors (see below), whose sum is σ = 281848536. Its totient is φ = 182820096.

The previous prime is 231699389. The next prime is 231699449. The reversal of 231699445 is 544996132.

It can be written as a sum of positive squares in 4 ways, for example, as 52969284 + 178730161 = 7278^2 + 13369^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 231699445 - 2²¹ = 229602293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231699449) 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, 317032 + ... + 317761.

It is an arithmetic number, because the mean of its divisors is an integer number (35231067).

Almost surely, 2^231699445 is an apocalyptic number.

It is an amenable number.

231699445 is a deficient number, since it is larger than the sum of its proper divisors (50149091).

231699445 is an equidigital number, since it uses as much as digits as its factorization.

231699445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634871.

The product of its digits is 233280, while the sum is 43.

The square root of 231699445 is about 15221.6768130190. The cubic root of 231699445 is about 614.1979055899.

It can be divided in two parts, 2316 and 99445, that added together give a square (101761 = 319²).

The spelling of 231699445 in words is "two hundred thirty-one million, six hundred ninety-nine thousand, four hundred forty-five".