15496561 has 4 divisors (see below), whose sum is σ = 15692800. Its totient is φ = 15300324.

The previous prime is 15496553. The next prime is 15496577. The reversal of 15496561 is 16569451.

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: 16569451 = 37 ⋅447823.

It is a cyclic number.

It is not a de Polignac number, because 15496561 - 2³ = 15496553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15496561.

It is not an unprimeable number, because it can be changed into a prime (15496361) 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, 98001 + ... + 98158.

It is an arithmetic number, because the mean of its divisors is an integer number (3923200).

Almost surely, 2^15496561 is an apocalyptic number.

It is an amenable number.

15496561 is a deficient number, since it is larger than the sum of its proper divisors (196239).

15496561 is an equidigital number, since it uses as much as digits as its factorization.

15496561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196238.

The product of its digits is 32400, while the sum is 37.

The square root of 15496561 is about 3936.5671593407. The cubic root of 15496561 is about 249.3131064374.

The spelling of 15496561 in words is "fifteen million, four hundred ninety-six thousand, five hundred sixty-one".