231726628442 has 4 divisors (see below), whose sum is σ = 347589942666. Its totient is φ = 115863314220.

The previous prime is 231726628429. The next prime is 231726628447. The reversal of 231726628442 is 244826627132.

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., 177916083601 + 53810544841 = 421801^2 + 231971^2 .

It is not an unprimeable number, because it can be changed into a prime (231726628447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57931657109 + ... + 57931657112.

Almost surely, 2^231726628442 is an apocalyptic number.

231726628442 is a deficient number, since it is larger than the sum of its proper divisors (115863314224).

231726628442 is a wasteful number, since it uses less digits than its factorization.

231726628442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115863314223.

The product of its digits is 1548288, while the sum is 47.

The spelling of 231726628442 in words is "two hundred thirty-one billion, seven hundred twenty-six million, six hundred twenty-eight thousand, four hundred forty-two".