15255414421 has 8 divisors (see below), whose sum is σ = 16698235064. Its totient is φ = 13851069120.

The previous prime is 15255414409. The next prime is 15255414467. The reversal of 15255414421 is 12441455251.

15255414421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2341592100 + 12913822321 = 48390^2 + 113639^2 .

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 15255414421 - 2²⁷ = 15121196693 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 (15255414481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9618006 + ... + 9619591.

It is an arithmetic number, because the mean of its divisors is an integer number (2087279383).

Almost surely, 2^15255414421 is an apocalyptic number.

It is an amenable number.

15255414421 is a deficient number, since it is larger than the sum of its proper divisors (1442820643).

15255414421 is a wasteful number, since it uses less digits than its factorization.

15255414421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19237671.

The product of its digits is 32000, while the sum is 34.

Adding to 15255414421 its reverse (12441455251), we get a palindrome (27696869672).

The spelling of 15255414421 in words is "fifteen billion, two hundred fifty-five million, four hundred fourteen thousand, four hundred twenty-one".