15100661 has 4 divisors (see below), whose sum is σ = 15326112. Its totient is φ = 14875212.

The previous prime is 15100639. The next prime is 15100663. The reversal of 15100661 is 16600151.

It is a happy number.

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: 16600151 = 29 ⋅572419.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15100661 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 (15100663) 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, 112625 + ... + 112758.

It is an arithmetic number, because the mean of its divisors is an integer number (3831528).

Almost surely, 2^15100661 is an apocalyptic number.

It is an amenable number.

15100661 is a deficient number, since it is larger than the sum of its proper divisors (225451).

15100661 is an equidigital number, since it uses as much as digits as its factorization.

15100661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225450.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 15100661 is about 3885.9568963127. The cubic root of 15100661 is about 247.1716476963.

The spelling of 15100661 in words is "fifteen million, one hundred thousand, six hundred sixty-one".