15990471 has 24 divisors (see below), whose sum is σ = 26900640. Its totient is φ = 8963136.

The previous prime is 15990437. The next prime is 15990473. The reversal of 15990471 is 17409951.

It is not a de Polignac number, because 15990471 - 2¹³ = 15982279 is a prime.

It is a super-3 number, since 3×15990471³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15990473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 945 + ... + 5733.

It is an arithmetic number, because the mean of its divisors is an integer number (1120860).

Almost surely, 2^15990471 is an apocalyptic number.

15990471 is a deficient number, since it is larger than the sum of its proper divisors (10910169).

15990471 is a wasteful number, since it uses less digits than its factorization.

15990471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4855 (or 4852 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 15990471 is about 3998.8086975998. The cubic root of 15990471 is about 251.9341759295.

It can be divided in two parts, 15990 and 471, that added together give a palindrome (16461).

The spelling of 15990471 in words is "fifteen million, nine hundred ninety thousand, four hundred seventy-one".