15973231007 has 4 divisors (see below), whose sum is σ = 16010121120. Its totient is φ = 15936340896.

The previous prime is 15973231003. The next prime is 15973231019. The reversal of 15973231007 is 70013237951.

15973231007 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 is a cyclic number.

It is not a de Polignac number, because 15973231007 - 2² = 15973231003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15973231003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18444407 + ... + 18445272.

It is an arithmetic number, because the mean of its divisors is an integer number (4002530280).

Almost surely, 2^15973231007 is an apocalyptic number.

15973231007 is a deficient number, since it is larger than the sum of its proper divisors (36890113).

15973231007 is an equidigital number, since it uses as much as digits as its factorization.

15973231007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36890112.

The product of its (nonzero) digits is 39690, while the sum is 38.

Adding to 15973231007 its reverse (70013237951), we get a palindrome (85986468958).

The spelling of 15973231007 in words is "fifteen billion, nine hundred seventy-three million, two hundred thirty-one thousand, seven".