15222401 has 4 divisors (see below), whose sum is σ = 16023600. Its totient is φ = 14421204.

The previous prime is 15222391. The next prime is 15222409. The reversal of 15222401 is 10422251.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15222401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15222401.

It is not an unprimeable number, because it can be changed into a prime (15222409) 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, 400571 + ... + 400608.

It is an arithmetic number, because the mean of its divisors is an integer number (4005900).

Almost surely, 2^15222401 is an apocalyptic number.

It is an amenable number.

15222401 is a deficient number, since it is larger than the sum of its proper divisors (801199).

15222401 is an equidigital number, since it uses as much as digits as its factorization.

15222401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801198.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 15222401 is about 3901.5895478638. The cubic root of 15222401 is about 247.8340949442.

Adding to 15222401 its reverse (10422251), we get a palindrome (25644652).

The spelling of 15222401 in words is "fifteen million, two hundred twenty-two thousand, four hundred one".