15228459481 has 4 divisors (see below), whose sum is σ = 15599885364. Its totient is φ = 14857033600.

The previous prime is 15228459451. The next prime is 15228459509. The reversal of 15228459481 is 18495482251.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18495482251 = 4231 ⋅4371421.

It can be written as a sum of positive squares in 2 ways, for example, as 4341623881 + 10886835600 = 65891^2 + 104340^2 .

It is a cyclic number.

It is not a de Polignac number, because 15228459481 - 2²⁵ = 15194905049 is a prime.

It is a super-2 number, since 2×15228459481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15228459431) 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, 185712880 + ... + 185712961.

It is an arithmetic number, because the mean of its divisors is an integer number (3899971341).

Almost surely, 2^15228459481 is an apocalyptic number.

It is an amenable number.

15228459481 is a deficient number, since it is larger than the sum of its proper divisors (371425883).

15228459481 is an equidigital number, since it uses as much as digits as its factorization.

15228459481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371425882.

The product of its digits is 921600, while the sum is 49.

The spelling of 15228459481 in words is "fifteen billion, two hundred twenty-eight million, four hundred fifty-nine thousand, four hundred eighty-one".