231404431442 has 8 divisors (see below), whose sum is σ = 347247013116. Its totient is φ = 115655427072.

The previous prime is 231404431439. The next prime is 231404431469. The reversal of 231404431442 is 244134404132.

It can be written as a sum of positive squares in 2 ways, for example, as 225348634681 + 6055796761 = 474709^2 + 77819^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 231404431399 and 231404431408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23388143 + ... + 23398034.

Almost surely, 2^231404431442 is an apocalyptic number.

231404431442 is a deficient number, since it is larger than the sum of its proper divisors (115842581674).

231404431442 is a wasteful number, since it uses less digits than its factorization.

231404431442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46788652.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 231404431442 its reverse (244134404132), we get a palindrome (475538835574).

The spelling of 231404431442 in words is "two hundred thirty-one billion, four hundred four million, four hundred thirty-one thousand, four hundred forty-two".