15652081 has 4 divisors (see below), whose sum is σ = 15985152. Its totient is φ = 15319012.

The previous prime is 15652079. The next prime is 15652093. The reversal of 15652081 is 18025651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18025651 = 7 ⋅2575093.

It is a cyclic number.

It is not a de Polignac number, because 15652081 - 2¹ = 15652079 is a prime.

It is a super-2 number, since 2×15652081² = 489975279261122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15652001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166465 + ... + 166558.

It is an arithmetic number, because the mean of its divisors is an integer number (3996288).

Almost surely, 2^15652081 is an apocalyptic number.

It is an amenable number.

15652081 is a deficient number, since it is larger than the sum of its proper divisors (333071).

15652081 is an equidigital number, since it uses as much as digits as its factorization.

15652081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333070.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 15652081 is about 3956.2710978900. The cubic root of 15652081 is about 250.1443486378.

The spelling of 15652081 in words is "fifteen million, six hundred fifty-two thousand, eighty-one".