15516421432315 has 8 divisors (see below), whose sum is σ = 18620331959088. Its totient is φ = 12412719652320.

The previous prime is 15516421432301. The next prime is 15516421432321. The reversal of 15516421432315 is 51323412461551.

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

It is not a de Polignac number, because 15516421432315 - 2¹³ = 15516421424123 is a prime.

It is a super-2 number, since 2×15516421432315² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52023117 + ... + 52320526.

It is an arithmetic number, because the mean of its divisors is an integer number (2327541494886).

Almost surely, 2^{15516421432315} is an apocalyptic number.

15516421432315 is a deficient number, since it is larger than the sum of its proper divisors (3103910526773).

15516421432315 is a wasteful number, since it uses less digits than its factorization.

15516421432315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104373389.

The product of its digits is 432000, while the sum is 43.

Adding to 15516421432315 its reverse (51323412461551), we get a palindrome (66839833893866).

The spelling of 15516421432315 in words is "fifteen trillion, five hundred sixteen billion, four hundred twenty-one million, four hundred thirty-two thousand, three hundred fifteen".