38431289521 has 3 divisors (see below), whose sum is σ = 38431485561. Its totient is φ = 38431093482.

The previous prime is 38431289509. The next prime is 38431289539. The reversal of 38431289521 is 12598213483.

The square root of 38431289521 is 196039.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 38431289521 - 2⁵ = 38431289489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38431289591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 98020 + ... + 294058.

It is an arithmetic number, because the mean of its divisors is an integer number (12810495187).

Almost surely, 2^38431289521 is an apocalyptic number.

38431289521 is the 196039-th square number.

38431289521 is the 98020-th centered octagonal number.

It is an amenable number.

38431289521 is a deficient number, since it is larger than the sum of its proper divisors (196040).

38431289521 is an frugal number, since it uses more digits than its factorization.

38431289521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392078 (or 196039 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The spelling of 38431289521 in words is "thirty-eight billion, four hundred thirty-one million, two hundred eighty-nine thousand, five hundred twenty-one".