15542229 has 4 divisors (see below), whose sum is σ = 20722976. Its totient is φ = 10361484.

The previous prime is 15542207. The next prime is 15542269. The reversal of 15542229 is 92224551.

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.

It is not a de Polignac number, because 15542229 - 2⁸ = 15541973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15542196 and 15542205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15542269) 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, 2590369 + ... + 2590374.

It is an arithmetic number, because the mean of its divisors is an integer number (5180744).

Almost surely, 2^15542229 is an apocalyptic number.

It is an amenable number.

15542229 is a deficient number, since it is larger than the sum of its proper divisors (5180747).

15542229 is an equidigital number, since it uses as much as digits as its factorization.

15542229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5180746.

The product of its digits is 7200, while the sum is 30.

The square root of 15542229 is about 3942.3633774679. The cubic root of 15542229 is about 249.5577728686.

The spelling of 15542229 in words is "fifteen million, five hundred forty-two thousand, two hundred twenty-nine".