231601442164 has 6 divisors (see below), whose sum is σ = 405302523794. Its totient is φ = 115800721080.

The previous prime is 231601442099. The next prime is 231601442201. The reversal of 231601442164 is 461244106132.

It can be written as a sum of positive squares in only one way, i.e., 219914102500 + 11687339664 = 468950^2 + 108108^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28950180267 + ... + 28950180274.

Almost surely, 2^231601442164 is an apocalyptic number.

It is an amenable number.

231601442164 is a deficient number, since it is larger than the sum of its proper divisors (173701081630).

231601442164 is a wasteful number, since it uses less digits than its factorization.

231601442164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57900360545 (or 57900360543 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

Adding to 231601442164 its reverse (461244106132), we get a palindrome (692845548296).

The spelling of 231601442164 in words is "two hundred thirty-one billion, six hundred one million, four hundred forty-two thousand, one hundred sixty-four".