231305302 has 4 divisors (see below), whose sum is σ = 346957956. Its totient is φ = 115652650.

The previous prime is 231305287. The next prime is 231305309. The reversal of 231305302 is 203503132.

231305302 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×231305302² = 107004285466622408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231305302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231305309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57826324 + ... + 57826327.

It is an arithmetic number, because the mean of its divisors is an integer number (86739489).

Almost surely, 2^231305302 is an apocalyptic number.

231305302 is a deficient number, since it is larger than the sum of its proper divisors (115652654).

231305302 is a wasteful number, since it uses less digits than its factorization.

231305302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115652653.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 231305302 is about 15208.7245356078. The cubic root of 231305302 is about 613.8494380553.

Adding to 231305302 its reverse (203503132), we get a palindrome (434808434).

The spelling of 231305302 in words is "two hundred thirty-one million, three hundred five thousand, three hundred two".