231040402 has 4 divisors (see below), whose sum is σ = 346560606. Its totient is φ = 115520200.

The previous prime is 231040363. The next prime is 231040423. The reversal of 231040402 is 204040132.

231040402 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 can be written as a sum of positive squares in only one way, i.e., 224430361 + 6610041 = 14981^2 + 2571^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57760099 + ... + 57760102.

Almost surely, 2^231040402 is an apocalyptic number.

231040402 is a deficient number, since it is larger than the sum of its proper divisors (115520204).

231040402 is a wasteful number, since it uses less digits than its factorization.

231040402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115520203.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 231040402 is about 15200.0132236785. The cubic root of 231040402 is about 613.6150136394.

Adding to 231040402 its reverse (204040132), we get a palindrome (435080534).

The spelling of 231040402 in words is "two hundred thirty-one million, forty thousand, four hundred two".