15222013 has 8 divisors (see below), whose sum is σ = 15905880. Its totient is φ = 14548800.

The previous prime is 15221963. The next prime is 15222041. The reversal of 15222013 is 31022251.

It can be written as a sum of positive squares in 4 ways, for example, as 5968249 + 9253764 = 2443^2 + 3042^2 .

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 15222013 - 2⁹ = 15221501 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 (15222913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331 + ... + 5527.

It is an arithmetic number, because the mean of its divisors is an integer number (1988235).

Almost surely, 2^15222013 is an apocalyptic number.

It is an amenable number.

15222013 is a deficient number, since it is larger than the sum of its proper divisors (683867).

15222013 is a wasteful number, since it uses less digits than its factorization.

15222013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5327.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 15222013 is about 3901.5398242233. The cubic root of 15222013 is about 247.8319892658.

Adding to 15222013 its reverse (31022251), we get a palindrome (46244264).

The spelling of 15222013 in words is "fifteen million, two hundred twenty-two thousand, thirteen".