15952281 has 8 divisors (see below), whose sum is σ = 21290784. Its totient is φ = 10624320.

The previous prime is 15952241. The next prime is 15952283. The reversal of 15952281 is 18225951.

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

It is not a de Polignac number, because 15952281 - 2¹⁴ = 15935897 is a prime.

It is a super-2 number, since 2×15952281² = 508950538205922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (15952283) 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, 2130 + ... + 6036.

It is an arithmetic number, because the mean of its divisors is an integer number (2661348).

Almost surely, 2^15952281 is an apocalyptic number.

It is an amenable number.

15952281 is a deficient number, since it is larger than the sum of its proper divisors (5338503).

15952281 is a wasteful number, since it uses less digits than its factorization.

15952281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5271.

The product of its digits is 7200, while the sum is 33.

The square root of 15952281 is about 3994.0306708887. The cubic root of 15952281 is about 251.7334514706.

The spelling of 15952281 in words is "fifteen million, nine hundred fifty-two thousand, two hundred eighty-one".