15055661 has 8 divisors (see below), whose sum is σ = 15293880. Its totient is φ = 14819328.

The previous prime is 15055643. The next prime is 15055681. The reversal of 15055661 is 16655051.

It can be written as a sum of positive squares in 4 ways, for example, as 2910436 + 12145225 = 1706^2 + 3485^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 15055661 - 2¹⁸ = 14793517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15055631) 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, 25805 + ... + 26381.

It is an arithmetic number, because the mean of its divisors is an integer number (1911735).

Almost surely, 2^15055661 is an apocalyptic number.

It is an amenable number.

15055661 is a deficient number, since it is larger than the sum of its proper divisors (238219).

15055661 is an equidigital number, since it uses as much as digits as its factorization.

15055661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 15055661 is about 3880.1624965973. The cubic root of 15055661 is about 246.9258794028.

The spelling of 15055661 in words is "fifteen million, fifty-five thousand, six hundred sixty-one".