15481222 has 4 divisors (see below), whose sum is σ = 23221836. Its totient is φ = 7740610.

The previous prime is 15481217. The next prime is 15481223. The reversal of 15481222 is 22218451.

15481222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×15481222² = 479336469226568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15481223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3870304 + ... + 3870307.

It is an arithmetic number, because the mean of its divisors is an integer number (5805459).

Almost surely, 2^15481222 is an apocalyptic number.

15481222 is a deficient number, since it is larger than the sum of its proper divisors (7740614).

15481222 is an equidigital number, since it uses as much as digits as its factorization.

15481222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7740613.

The product of its digits is 1280, while the sum is 25.

The square root of 15481222 is about 3934.6184058940. The cubic root of 15481222 is about 249.2308198748.

Adding to 15481222 its reverse (22218451), we get a palindrome (37699673).

The spelling of 15481222 in words is "fifteen million, four hundred eighty-one thousand, two hundred twenty-two".