15552201 has 8 divisors (see below), whose sum is σ = 23698624. Its totient is φ = 8886960.

The previous prime is 15552191. The next prime is 15552217. The reversal of 15552201 is 10225551.

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

It is not a de Polignac number, because 15552201 - 2¹⁸ = 15290057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 740581 = 15552201 / (1 + 5 + 5 + 5 + 2 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15552281) 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, 370270 + ... + 370311.

It is an arithmetic number, because the mean of its divisors is an integer number (2962328).

Almost surely, 2^15552201 is an apocalyptic number.

It is an amenable number.

15552201 is a deficient number, since it is larger than the sum of its proper divisors (8146423).

15552201 is an equidigital number, since it uses as much as digits as its factorization.

15552201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740591.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 15552201 is about 3943.6278982683. The cubic root of 15552201 is about 249.6111341136.

Adding to 15552201 its reverse (10225551), we get a palindrome (25777752).

It can be divided in two parts, 15552 and 201, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 15552201 in words is "fifteen million, five hundred fifty-two thousand, two hundred one".