15083161721 has 8 divisors (see below), whose sum is σ = 15447385800. Its totient is φ = 14721887232.

The previous prime is 15083161711. The next prime is 15083161741. The reversal of 15083161721 is 12716138051.

It can be written as a sum of positive squares in 4 ways, for example, as 2508006400 + 12575155321 = 50080^2 + 112139^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15083161721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15083161711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727046 + ... + 747503.

It is an arithmetic number, because the mean of its divisors is an integer number (1930923225).

Almost surely, 2^15083161721 is an apocalyptic number.

It is an amenable number.

15083161721 is a deficient number, since it is larger than the sum of its proper divisors (364224079).

15083161721 is a wasteful number, since it uses less digits than its factorization.

15083161721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474795.

The product of its (nonzero) digits is 10080, while the sum is 35.

Adding to 15083161721 its reverse (12716138051), we get a palindrome (27799299772).

The spelling of 15083161721 in words is "fifteen billion, eighty-three million, one hundred sixty-one thousand, seven hundred twenty-one".