15551229 has 8 divisors (see below), whose sum is σ = 20997760. Its totient is φ = 10236096.

The previous prime is 15551213. The next prime is 15551231. The reversal of 15551229 is 92215551.

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

It is not a de Polignac number, because 15551229 - 2⁴ = 15551213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15551196 and 15551205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15551269) 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, 32572 + ... + 33045.

It is an arithmetic number, because the mean of its divisors is an integer number (2624720).

Almost surely, 2^15551229 is an apocalyptic number.

It is an amenable number.

15551229 is a deficient number, since it is larger than the sum of its proper divisors (5446531).

15551229 is an equidigital number, since it uses as much as digits as its factorization.

15551229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65699.

The product of its digits is 4500, while the sum is 30.

The square root of 15551229 is about 3943.5046595636. The cubic root of 15551229 is about 249.6059338405.

The spelling of 15551229 in words is "fifteen million, five hundred fifty-one thousand, two hundred twenty-nine".