15315047 has 4 divisors (see below), whose sum is σ = 16707336. Its totient is φ = 13922760.

The previous prime is 15315037. The next prime is 15315049. The reversal of 15315047 is 74051351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74051351 = 11 ⋅6731941.

It is a cyclic number.

It is not a de Polignac number, because 15315047 - 2⁶ = 15314983 is a prime.

It is a super-2 number, since 2×15315047² = 469101329224418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15315049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696128 + ... + 696149.

It is an arithmetic number, because the mean of its divisors is an integer number (4176834).

Almost surely, 2^15315047 is an apocalyptic number.

15315047 is a deficient number, since it is larger than the sum of its proper divisors (1392289).

15315047 is a wasteful number, since it uses less digits than its factorization.

15315047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392288.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 15315047 is about 3913.4443908148. Note that the first 3 decimals coincide. The cubic root of 15315047 is about 248.3358645248.

Adding to 15315047 its reverse (74051351), we get a palindrome (89366398).

The spelling of 15315047 in words is "fifteen million, three hundred fifteen thousand, forty-seven".